The molecule is a long-chain fatty acid ethyl ester resulting from the formal condensation of the carboxy group of (4Z,7Z,10Z,13Z,16Z,19Z)-docosahexaenoic acid with the hydroxy group of ethanol. It derives from an all-cis-docosa-4,7,10,13,16,19-hexaenoic acid.
ethyl (4Z,7Z,10Z,13Z,16Z,19Z)-docosa-4,7,10,13,16,19-hexaenoate