The molecule is a 1-(Z)-alk-1-enyl-2-acyl-sn-glycero-3-phosphocholine in which the alkeny and acyl group specified at positions 1 and 2 are (1Z)-octadecenyl and (9Z)-octadecenoyl respectively. It derives from an oleic acid.
[(2R)-3-[(Z)-octadec-1-enoxy]-2-[(Z)-octadec-9-enoyl]oxypropyl] 2-(trimethylazaniumyl)ethyl phosphate