Sandanayake, Saman et al. published their research in Australian Journal of Chemistry in 2014 | CAS: 66943-05-3

1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3) belongs to ethers. The oxygen atom in ethers are more electronegative than carbon, thus the hydrogens which are alpha to the ethers are more acidic than the simple hydrocarbons. Ethers can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds. The ability to form hydrogen bonds with other compounds makes ethers particularly good solvents for a wide variety of organic compounds and a surprisingly large number of inorganic compounds.SDS of cas: 66943-05-3

Crown Ether Derivatised Pyromellitic Diimides was written by Sandanayake, Saman;Langford, Steven J.. And the article was included in Australian Journal of Chemistry in 2014.SDS of cas: 66943-05-3 This article mentions the following:

Pyromellitic diimide functionalized on the aromatic core with azacrown ethers were synthesized and characterized by anal. methods including x-ray crystallog. Changes in their UV-visible spectra by the addition of metal salts were studied. In the experiment, the researchers used many compounds, for example, 1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3SDS of cas: 66943-05-3).

1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3) belongs to ethers. The oxygen atom in ethers are more electronegative than carbon, thus the hydrogens which are alpha to the ethers are more acidic than the simple hydrocarbons. Ethers can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds. The ability to form hydrogen bonds with other compounds makes ethers particularly good solvents for a wide variety of organic compounds and a surprisingly large number of inorganic compounds.SDS of cas: 66943-05-3

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