Category: ethers-buliding-blocks

The enhanced bioavailability of free curcumin and bioactive-metabolite tetrahydrocurcumin from a dispersible, oleoresin-based turmeric formulation was written by Panda, Sanjib Kumar;Nirvanashetty, Somashekara;Missamma, M.;Jackson-Michel, Shavon. And the article was included in Medicine (Philadelphia, PA, United States) in 2021.Quality Control of Bisdemethoxycurcumin The following contents are mentioned in the article:

Curcuminoids have been widely studied for human health and disease applications, yet bioavailability remains a hurdle to actualizing all the benefits ascribed to them. The lack of standardization in anal. method, confusion about what constitutes an ideal analyte, and conflicting thoughts around dosing strategies have made it difficult to draw parity between bioavailability and bioactivity and establish a baseline for formulation comparisons. This randomized double-blinded, 2-way cross over, single oral dose, comparative bioavailability study differentially evaluates curcumin at the time of its absorption and along various biotransformation pathways, to include free curcumin, the readily usable form of curcumin; individual and composite totals of curcumin and its analogs as exogenously cleaved conjugates, for example, total curcumin, total demethoxycurcumin (DMC), total bisdemethoxycurcumin (BDMC), and total curcuminoids resp.; and the bioactive metabolite of curcumin, total tetrahydrocurcumin (THC). As a primary study objective, the relative bioavailability of CURCUGEN, a novel dispersible, 50% curcuminoids-concentrated turmeric extract was compared to the standard curcumin reference product, curcuminoids 95% standardized extract (C-95), using the maximum concentration (C_max), and area under the curve (AUC_0-t) of free curcumin, total curcumin, total DMC, total BDMC and the curcumin active metabolite, as total THC. The evaluation of free curcumin demonstrated that the C_max and AUC_0-t of the CURCUGEN was 16.1 times and 39 times higher than the C_max and AUC_0-t of C-95. Furthermore, total curcumin, total DMC, total BDMC, and total curcuminoids resulted in AUC_0-t of the CURCUGEN at 49.5-, 43.5-, 46.8-, and 52.5-fold higher than C-95, resp. The relative bioavailability of CURCUGEN for total THC was found to be 31 times higher when compared to C-95. As the first human pharmacokinetics study to apply best-practice recommendations and pharmaceutically-aligned guidance in the comprehensive evaluation of a novel curcuminoids formulation, we have established the novelty of said formulation while better standardizing for the common variances and discrepancies between curcuminoids and their derivatives in the literature and com. marketing, alike. This study involved multiple reactions and reactants, such as Bisdemethoxycurcumin (cas: 33171-05-0Quality Control of Bisdemethoxycurcumin).

Bisdemethoxycurcumin (cas: 33171-05-0) belongs to ethers. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Quality Control of Bisdemethoxycurcumin

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Discovery of benzo[d]isothiazole derivatives as novel scaffold inhibitors targeting the programmed cell death-1/programmed cell death-ligand 1 (PD-1/PD-L1) interaction through “ring fusion” strategy was written by Gao, Yinli;Wang, Hanxun;Shen, Lanlan;Xu, Hanqing;Deng, Minghui;Cheng, Maosheng;Wang, Jian. And the article was included in Bioorganic Chemistry in 2022.COA of Formula: C3H9NO The following contents are mentioned in the article:

The inhibition of programmed cell death-1/programmed cell death-ligand 1 (PD-1/PD-L1) interaction by monoclonal antibodies (mAbs) has achieved promising outcomes in cancer immunotherapy. Due to the inherent deficiencies of mAbs drugs, such as high cost of treatment, immunogenicity, poor pharmacokinetics and penetration of solid tumors, researchers are encouraged to develop small mol. inhibitors, to overcome mAbs drugs deficiencies and change the situation where small mol. drugs are not available on the market. Herein, we reported a series of benzo[d]isothiazole derivatives targeting the PD-1/PD-L1 interaction through “ring fusion” strategy using BMS-202 as a starting point. Among them, compound (3-bromo-4-((7-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)benzo[d] isothiazol-3-yl)amino)benzyl)-L-serine exhibited the best inhibitory activity with an IC₅₀ value of 5.7 nM by homogeneous time-resolved fluorescence (HTRF) binding assay. In immunotoxicity anal., (3-bromo-4-((7-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)benzo[d] isothiazol-3-yl)amino)benzyl)-L-serine showed low cytotoxicity to Jurkat T cells in CCK-8 assay compared to BMS-202. The binding mode between (3-bromo-4-((7-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)benzo[d] isothiazol-3-yl)amino)benzyl)-L-serine and PD-L1 protein was explored by mol. docking and mol. dynamics (MD) simulations, which revealed crucial chem. groups, such as biphenyl group interacting with Ile54A, Tyr56A, Met115A, Ala121A, Ile54B, Met115B, Ala121B and Tyr123B by hydrophobic interactions, bromobenzene moiety forming π-π stacking interaction with Tyr56B, as well as L-serine moiety forming hydrogen bond (H-bond) and salt bridge interactions with Asp122A and Lys124A. Furthermore, mol. modeling studies showed that (3-bromo-4-((7-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)benzo[d] isothiazol-3-yl)amino)benzyl)-L-serine is likely to bind to the FA8 (fatty acid 8) binding site of human serum albumin (HSA). Taken together, (3-bromo-4-((7-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)benzo[d] isothiazol-3-yl)amino)benzyl)-L-serine significantly inhibits the PD-1/PD-L1 interaction with low cytotoxicity, indicating that (3-bromo-4-((7-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)benzo[d] isothiazol-3-yl)amino)benzyl)-L-serine is a promising starting point for further drug development in cancer immunotherapy. This study involved multiple reactions and reactants, such as 2-Methoxyethylamine (cas: 109-85-3COA of Formula: C3H9NO).

2-Methoxyethylamine (cas: 109-85-3) belongs to ethers. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.COA of Formula: C3H9NO

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Hydroxyl Group Stabilization for Increased Yields of Low-Molecular-Weight Products in the Copyrolysis of Cellulose and Thermoplastics was written by Nallar, Melisa;Wong, Hsi-Wu. And the article was included in Industrial & Engineering Chemistry Research in 2019.Name: 2-(2-(Hexyloxy)ethoxy)ethanol The following contents are mentioned in the article:

Biomass is a promising renewable and sustainable resource to produce energy and value-added chems. Fast pyrolysis is one of the simplest thermochem. methods to convert biomass into high yields of liquid products that can be upgraded into drop-in fuels or platform chems.; however, its diverse product distributions and low product selectivity incur significant cost due to subsequent upgrading and separation operations. In this work, a strategy to promote yields of low-mol.-weight products (LMWPs) from cellulose pyrolysis via hydroxyl group stabilization using molten polymers (MPs) is presented. Three types of thermoplastics, high-d. polyethylene (HDPE), polyethylene glycol (PEG), and polystyrene (PS), were copyrolyzed with cellulose to investigate the possible hydroxyl group stabilization effects caused by the ether and aromatic moieties in MPs during cellulose pyrolysis. A custom-made batch pyrolysis reactor was employed for the copyrolysis experiments Our results showed that the combined yields of levoglucosan (LG) and LMWPs significantly increased in the presence of MPs due to the phys. inhibition of anhydrosugar oligomer evaporation The product distributions were varied dependent on the MPs used. In particular, both ether groups in PEG and aromatic groups in PS were found to stabilize the cellulosic hydroxyl groups during glycosidic bond cleavage, inhibiting the formation of LG. Aromatic moieties in MPs were observed to create a stronger inhibition effect on the glycosidic bond cleavage than ether moieties. Our experiments also suggest that both ether and aromatic groups in MPs stabilize the hydroxyl groups during dehydration, leading to increased yields of products from retro-Diels-Alder fragmentation. Ether moieties were found to be more effective at inhibiting dehydration than aromatic moieties. Yields of the HDPE-derived products increased during copyrolysis, suggesting a possible catalytic effect in HDPE pyrolysis caused by the LMWPs produced from carbohydrate pyrolysis. Yields of the PEG-derived products increased only in the presence of cellulose and glucose, whereas yields of the PS-derived products were unaffected in all copyrolysis experiments A possible reaction mechanism accounting for the hydroxyl group stabilization effects is proposed based on our exptl. findings. This study involved multiple reactions and reactants, such as 2-(2-(Hexyloxy)ethoxy)ethanol (cas: 112-59-4Name: 2-(2-(Hexyloxy)ethoxy)ethanol).

2-(2-(Hexyloxy)ethoxy)ethanol (cas: 112-59-4) belongs to ethers. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Name: 2-(2-(Hexyloxy)ethoxy)ethanol

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

β(4-Hydroxy-2-methylphenoxy)lactic acid, a metabolite of mephenesin was written by Ludwig, B. J.;Luts, H.;West, W. A.. And the article was included in Journal of the American Chemical Society in 1955.Recommanded Product: 4-(Benzyloxy)-3-methylphenol The following contents are mentioned in the article:

2,1,4-MeC₆H₃(OH)₂ (I) (24.8 g.) in 8.0 g. NaOH in 100 cc. H₂O, the mixture refluxed 2 hrs. with 12.5 g. ClCH₂CH(OH)CO₂H (II), cooled, saturated with CO₂, and washed with Et₂O to recover 19.5 g. unchanged I, the aqueous layer concentrated in vacuo, acidified with HCl, and extracted with Et₂O, the extract evaporated, the residue (2.6 g.) sublimed in vacuo to remove unchanged I, and the tan-colored, solid residue (1.5 g.) recrystallized repeatedly from hot PrNO₂ gave 3,4-Me(HO)C₆H₃OCH₂CH(OH)CO₂H, slightly colored crystals, m. 121-2°. Dihydropyran (16.8 g.) added with stirring to 12.4 g. I in 100 cc. dioxane containing 2 drops concentrated HCl at 25-30°, the mixture allowed to warm to 60°, and diluted with Et₂O, the organic layer extracted with 10% aqueous NaOH, the alk. solution neutralized with CO₂, diluted with H₂O, and extracted with CCl₄, the extract evaporated, and the colored residue (5.3 g.) recrystallized from Et₂O-ligroine containing a drop dihydropyran gave 4- hydroxy-3-methylphenyl-2-tetrahydropyranyl ether (III), white crystals, m. 90-1.5°. III (4.16 g.) in 12 g. 10% aqueous NaOH refluxed 3 hrs. with 1.25 g. II, the solution cooled, saturated with CO₂, and extracted with Et₂O, the aqueous portion acidified with HCl, saturated with Na₂SO₄, and extracted with Et₂O, the extract dried and evaporated, and the colored, solid residue (0.8 g.) recrystallized twice from C₆H₆-Et₂O and once from PrNO₂ gave 410 mg. 2,4-Me(HO)C₆H₃OCH₂CH(OH)CO₂H (IV), m. 168-9°. Synthetic and natural IV were identical with regard to their m.p., ultraviolet absorption, color test with Ehrlich reagent, and chromatographic behavior on paper. III (1.04 g.) treated in the usual manner with 1 equivalent PhCH₂Cl in 1 equivalent aqueous NaOH, the intermediate mixed diether hydrolyzed, and the mixture worked up in the usual manner gave a small amount of 2,5-PhCH₂(HO)C₆H₃Me, white crystals, m. 69.5-70.5°. This study involved multiple reactions and reactants, such as 4-(Benzyloxy)-3-methylphenol (cas: 100927-02-4Recommanded Product: 4-(Benzyloxy)-3-methylphenol).

4-(Benzyloxy)-3-methylphenol (cas: 100927-02-4) belongs to ethers. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Recommanded Product: 4-(Benzyloxy)-3-methylphenol

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Investigating the multi-target therapeutic mechanism of Guihuang formula on Chronic Prostatitis was written by Liu, Shengjing;Zhao, Feng;Deng, Yingjun;Zeng, Yin;Yan, Bin;Guo, Jun;Gao, Qinghe. And the article was included in Journal of Ethnopharmacology in 2022.Computed Properties of C19H16O4 The following contents are mentioned in the article:

Chronic prostatitis (CP) is a complex, intractable and prevalent urol. disorder in men with no effective treatment. Guihuang formula (GHF) is a traditional Chinese medicine compound that is advantageous as a CP treatment, but its etiol. is poorly understood. Research and exploration of the mechanism of GHF will help the development of a potentially valuable drug for CP and provide deeper insight into CP. To examine and further clarify the multi-target therapeutic mechanism of GHF on CP. The chem. components in GHF were identified using UPLC-Q/TOF-MS. The active components and potential targets of GHF for the treatment of CP were screened and analyzed using network pharmacol. and mol. docking. We constructed a CP rat model to investigate the therapeutic effect of GHF on CP and verify the influence of key targets and core pathways based on the results of network pharmacol. A total of 143 ingredients were identified in GHF using UPLC-Q/TOF-MS, and 111 potential targets for GHF of CP were predicted. The “drug-ingredient-target-pathway” network was constructed and in compliance with the “Jun-Chen-Zuo-Shi” principle. GHF significantly reduced the prostate index, alleviated histol. damage in the prostate, decreased CD3+ T cells and CD45+ leukocyte infiltration in the prostate, downregulated the expression of the proinflammatory cytokines IL-1β, IL-6, IL-18, COX-2, MCP-1 and TNF-α, decreased ROS levels and alleviated the production of MDA accompanied by an increase of SOD and GSH-PX levels. Meanwhile, GHF suppressed apoptosis in macrophages, downregulated the mRNA levels of PI3K, AKT and P65 NF-κB and inhibited the phosphorylation of the PI3K, AKT and P65 NF-κB. A network pharmacol. and exptl. validation-based strategy was used to elucidate the underlying “multicomponent, multitarget, and multipathway” mode of action of GHF against CP. We verified that GHF inhibited oxidative stress and inflammatory response, suppressed apoptosis in macrophages, inhibited the activation of the inflammation-related PI3K/AKT/NF-κB pathway in CP rat. These findings extend the conventional views of “one drug hits one target”, and offer novel insights and indication paradigm for the future discovery on the multi-target therapeutic mechanism of traditional Chinese medicine compound This study involved multiple reactions and reactants, such as Bisdemethoxycurcumin (cas: 33171-05-0Computed Properties of C19H16O4).

Bisdemethoxycurcumin (cas: 33171-05-0) belongs to ethers. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Computed Properties of C19H16O4

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Dietary bisdemethoxycurcumin supplementation attenuates lipopolysaccharide-induced damages on intestinal redox potential and redox status of broilers was written by Zhang, Jingfei;Han, Hongli;Zhang, Lili;Wang, Tian. And the article was included in Poultry Science in 2021.COA of Formula: C19H16O4 The following contents are mentioned in the article:

This study was conducted to investigate the beneficial effects of bisdemethoxycurcumin (BDC) on growth performance, glutathione (GSH) redox potential, antioxidant enzyme defense, and gene expression in lipopolysaccharide (LPS)-challenged broilers. A total of 320, male, 1-day-old broilers were randomly assigned to 4 treatment groups including 8 replicates with 10 birds per cage in a 2 x 2 factorial arrangement: BDC supplementation (a basal diet with 0 or 150 mg/kg BDC) and LPS challenge (i.p. injection of 1 mg/kg body weight saline or LPS at 16, 18, and 20 d of age). Results showed that dietary BDC supplementation prevented the LPS-induced decrease in ADG of broilers (P < 0.05). Compared to the saline-challenged group, LPS-challenged broilers showed higher jejunal and ileal malondialdehyde (MDA), protein carbonyl (PC), and 8-hydroxy-2′-deoxyguanosine (8-OHdG) contents (P < 0.05). Dietary BDC supplementation alleviated LPS-induced increases in jejunal 8-OHdG, ileal MDA, and PC contents (P < 0.05). LPS challenge impaired the small intestinal antioxidant system, as evident by the decreases of GSH and total thiol contents, as well as superoxide dismutase (SOD), glutathione peroxidase, glutathione reductase (GR), and glutathione S-transferase (GST) activities. On the other hand, LPS challenge also increased GSH redox potential and oxidized glutathione (GSSG) contents (P < 0.05). Dietary BDC supplementation increased jejunal and ileal GSH contents, SOD activities, jejunal GR activity, and ileal GST activity, while it decreased jejunal and ileal redox potential, and jejunal GSSG contents (P < 0.05). Dietary BDC supplementation significantly alleviated the downregulation of mRNA expression levels of jejunal and ileal copper and zinc superoxide dismutase, catalytic subunit of γ-glutamylcysteine ligase, nuclear factor erythroid-2-related factor 2, heme oxygenase 1, NAD(P)H quinone oxidoreductase 1, and jejunal catalase and GR induced by LPS challenge (P < 0.05). In conclusion, BDC demonstrated favorable protection against LPS-induced small intestinal oxidative damages, as indicated by the improved growth performance, decreased GSH redox potential, enhanced antioxidant enzyme activities, and upregulated antioxidant-related gene expression. This study involved multiple reactions and reactants, such as Bisdemethoxycurcumin (cas: 33171-05-0COA of Formula: C19H16O4).

Bisdemethoxycurcumin (cas: 33171-05-0) belongs to ethers. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. COA of Formula: C19H16O4

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Transcriptome analysis reveals the molecular mechanism of Yiqi Rougan decoction in reducing CCl₄-induced liver fbrosis in rats was written by Xiong, Yu;Hu, Jinyuan;Xuan, Chen;Tian, Jiayu;Tan, Kaiyue;Chen, Zhiwei;Luo, Yan;Du, Xuqin;Cheng, Junxiong;Zhang, Lanyue;Cao, Wenfu. And the article was included in Chinese Medicine (London, United Kingdom) in 2021.Recommanded Product: Bisdemethoxycurcumin The following contents are mentioned in the article:

Liver fibrosis develops from various chronic liver diseases, and there is currently a lack of specific treatment strategies. Yiqi Rougan decoction (YQRG) is a traditional Chinese medicine that has shown durative effects in the treatment of liver fibrosis; however, the mechanism associated with YQRG-related improvements in liver fibrosis remains to be exptl. determined This study evaluated the therapeutic effect of YQRG on carbon tetrachloride (CCl₄)-induced liver fibrosis in rats and its mol. mechanism. We used low-, medium-, and high-dose YQRG to treat CCl₄-induced liver fibrosis in rats, followed by assessment of liver injury and fibrosis according to liver appearance, body weight, liver mass index, histopathol. examination, and serum testing. Addnl., we performed transcriptome anal. using RNA-sequencing (RNA-seq) technol., including cluster, Gene Ontol. (GO), and pathway analyses, to identify differentially expressed genes (DEGs), and protein and gene expression were detected by immunofluorescence (IFC), western blot and real-time quant. PCR. The results showed that YQRG effectively alleviated CCl₄-induced liver injury and fibrosis in rats, including observations of improved liver function, decreased activity of hepatic stellate cells (HSCs), and decreased extracellular matrix (ECM) deposition. Moreover, we identified downregulated and upregulated DEGs in the model group relative to the control and YQRG-treated groups, with GO anal. revealing their enrichment in biol. processes, such as endoplasmic reticulum stress (ERS), apoptosis, and autophagy. Furthermore, pathway anal. showed that YQRG treatment downregulated the mitogen-activated protein kinase (MAPK) and phosphoinositide 3-kinase/Akt (PI3K/AKT) signalling pathways and upregulated other signalling pathways, including those related to peroxisome proliferator-activated receptors(PPAR) and AMP-activated protein kinase(AMPK), with these findings subsequently verified exptl. These findings showed that YQRG improved CCl₄-induced liver fibrosis through multiple mechanisms and pathways, offering critical insight into the YQRG-related therapeutic mechanism and promoting further research into its potential application. This study involved multiple reactions and reactants, such as Bisdemethoxycurcumin (cas: 33171-05-0Recommanded Product: Bisdemethoxycurcumin).

Bisdemethoxycurcumin (cas: 33171-05-0) belongs to ethers. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Recommanded Product: Bisdemethoxycurcumin

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

The Untargeted Capability of NMR Helps Recognizing Nefarious Adulteration in Natural Products was written by Kim, Seon Beom;Bisson, Jonathan;Friesen, J. Brent;Bucchini, Luca;Gafner, Stefan;Lankin, David C.;Chen, Shao-Nong;Pauli, Guido F.;McAlpine, James B.. And the article was included in Journal of Natural Products in 2021.HPLC of Formula: 33171-05-0 The following contents are mentioned in the article:

Curcuma longa (turmeric) has an extensive history of ethnomedical use for common ailments, and “curcumin”-containing dietary supplements (CDS) are a highly visible portion of today’s self-medication market. Owing to raw material cost pressure, CDS products are affected by economically motivated, nefarious adulteration with synthetic curcumin (“syncumin”), possibly leading to unexpected toxicol. issues due to “residual” impurities. Using a combination of targeted and untargeted (phyto)chem. anal., this study investigated the botanical integrity of two com. “turmeric” CDS with vitamin and other additives that were associated with reported clin. cases of hepatotoxicity. Analyzing multisolvent extracts of the CDS by 100% quant. ¹H NMR (qHNMR), alone and in combination with countercurrent separation (CCS), provided chem. fingerprints that allowed both the targeted identification and quantification of declared components and the untargeted recognition of adulteration. While confirming the presence of curcumin as a major constituent, the universal detection capability of NMR spectroscopy identification of significant residual impurities, including potentially toxic components. While the loss-free nature of CCS captured a wide polarity range of declared and unwanted chem. components, and also increased the dynamic range of the anal., (q)HNMR determined their mass proportions and chem. constitutions. The results demonstrate that NMR spectroscopy can recognize undeclared constituents even if they represent only a fraction of the mass balance of a dietary supplement product. The chem. information associated with the missing 4.8% and 7.4% (m/m) in the two com. samples, exhibiting an otherwise adequate curcumin content of 95.2% and 92.6%, resp., pointed to a product integrity issue and adulteration with undeclared synthetic curcumin. Impurities from synthesis are most plausibly the cause of the observed adverse clin. effects. The study exemplifies how the simultaneously targeted and untargeted anal. principle of the 100% qHNMR method, performed with entry-level high-field instrumentation (400 MHz), can enhance the safety of dietary supplements by identifying adulterated, non-natural “natural” products. This study involved multiple reactions and reactants, such as Bisdemethoxycurcumin (cas: 33171-05-0HPLC of Formula: 33171-05-0).

Bisdemethoxycurcumin (cas: 33171-05-0) belongs to ethers. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. HPLC of Formula: 33171-05-0

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Analysis of chemosensory markers in cigarette smoke from different tobacco varieties by GC×GC-TOFMS and chemometrics was written by Schwanz, Thiago G.;Bokowski, Liane V. V.;Marcelo, Marcelo C. A.;Jandrey, Angela C.;Dias, Jailson C.;Maximiano, Daniel H.;Canova, Luciana S.;Pontes, Oscar F. S.;Sabin, Guilherme P.;Kaiser, Samuel. And the article was included in Talanta in 2019.Computed Properties of C9H12O3 The following contents are mentioned in the article:

Com. cigarettes are made from a blend of different tobacco varieties, which in turn are the results of different agronomic practices and post-harvest curing processes. The highly complex mixture of smoke compounds reflects each tobacco variety and the levels of sensory-relevant markers. Therefore, the aim of this work was to identify potential relevant chemosensory markers in the mainstream smoke of four main types of com. tobaccos and establish any possible relationship between them and the tobacco growing/curing practices. The tobacco samples were segregated into four segments: (1) three curing stages of flue-cured Virginia, (2) three curing stages of air-cured Burley, (3) three geo-regions of sun-cured Oriental and (4) three different process applied to tobacco. One hundred and twenty cigarettes (10 batches per flavor category) were produced and smoked under standard machine-smoking protocols. The mainstream smoke samples collected were extracted and analyzed by GC × GC TOFMS. The processed data was analyzed by partial least square discriminant anal. (PLS-DA) and the selectivity ratio was used to identify key chemosensory markers responsible for the four segments. All models had sensitivity and specificity equal to unity. Flue-cured Virginia (193 markers) and air-cured Burley (184 markers) showed a similar trend for O-heterocycles markers in the lighter leaf colors and N-heterocycles in the darker leaf colors post-processing, but they had compounds of different flavor descriptions, e. g. sweet and nutty. The three geo-regions of sun-cured Oriental (290 markers) also presented O-heterocycles markers in correlation with leaf sugar contents in addition of sucrose esters markers. The three unusually processed tobacco generated many chem. markers (436 markers), some derived from the so-called Cavendish fermentation process with sweet, spicy and peppery notes, whereas the dark fermented air-cured tobacco presented similar descriptors as air-cured Burley. In addition, some polycyclic aromatic hydrocarbons (PAH) were detected as markers from the fire-curing process. The PLS-DA with selectivity ratio evidenced total of 1098 chemosensory markers in cigarette smoke, in which 173 were tentatively identified. This study involved multiple reactions and reactants, such as 4-Hydroxy-3-methoxyphenethanol (cas: 2380-78-1Computed Properties of C9H12O3).

4-Hydroxy-3-methoxyphenethanol (cas: 2380-78-1) belongs to ethers. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Computed Properties of C9H12O3

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Bisdemethoxycurcumin-conjugated vitamin E TPGS liposomes ameliorate poor bioavailability of free form and evaluation of its analgesic and hypouricemic activity in oxonate-treated rats was written by Wang, Qilong;Liu, Jing;Liu, Jian;Thant, Yaminn;Weng, Wen;Wei, Chunmei;Bao, Rui;Adu-Frimpong, Michael;Yu, Qingtong;Deng, Wenwen;Cao, Xia;Toreniyazov, Elmurat;Ji, Hao;Xu, Ximing;Yu, Jiangnan. And the article was included in Journal of Nanoparticle Research in 2021.Computed Properties of C19H16O4 The following contents are mentioned in the article:

Recently, bisdemethoxycurcumin (BDMC), a constituent of turmeric, has been studied widely in view of their various therapeutic effects, namely anti-oxidant, anti-cancer, anti-diabetic, and anti-inflammatory. Since ancient times, turmeric has been extensively used as a naturally occurring traditional Chinese medicine (TCM) and as a crucial home remedy for treatment of many health problems such as inflammation and pain. However, the action of anti-gouty arthritis and analgesic activity of its constituents, especially BDMC, have not been scientifically reported yet. Despite the various bioactivities of BDMC, its utilization in clinics has been restricted owing to poor solubility and bioavailability. This research aimed at enhancing oral bioavailability and pharmacokinetic of BDMC via liposome formulation which was modified with D-α-tocopherol polyethylene glycol 1000 succinate (TPGS or vitamin E TPGS) and was characterized using various parameters both in vitro and in vivo. Also, the analgesic and anti-gouty activities of BDMC-loaded TPGS-modified liposomes were investigated by assessing pain threshold and serum uric acid level in potassium oxonate-induced hyperuricemic rats. As the result, BDMC-loaded TPGS-modified liposomes were formulated successfully with optimal physiochem. properties such as 75.98 ± 5.46 nm (particle size), 0.246 ±0.011 (polydispersity index), – 38.21 ± 0.29 mV (zeta potential), 96.98 ± 0.17 (encapsulation efficiency (EE%)), and 4.84 ± 0.0089 (drug loading capacity (DL%)). Moreover, the oral bioavailability of liposomized BDMC was approx. 10-fold greater than free BDMC in vivo and in vitro cumulative release rates in pH 1.2 (78%) and pH 7 (68%) resp. This significantly improved the sustaining drug effect of BDMC compared with free form. In addition, BDMC-TPGS liposome acted as a xanthine oxidase inhibitor to evidently reduce uric acid level in potassium oxonate-induced hyperuricemic rats and remarkably increase pain threshold capacity and reaction time in hot plate test at a dose-dependent manner. Altogether, BDMC-conjugated TPGS liposome could act as favorable nanocarriers against gouty arthritis and intense pain with prospect of overcoming the limitation of BDMC application. This study involved multiple reactions and reactants, such as Bisdemethoxycurcumin (cas: 33171-05-0Computed Properties of C19H16O4).

Bisdemethoxycurcumin (cas: 33171-05-0) belongs to ethers. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Computed Properties of C19H16O4

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem