The molecule is a 2-acyl-1-alkyl-sn-glycero-3-phosphocholine in which the alkyl and the acyl groups at positions 1 and 2 are specified as hexadecyl and 4-oxobutyl respectively. It derives from a 5-oxopentanoic acid and a hexadecan-1-ol.
[(2R)-3-hexadecoxy-2-(5-oxopentanoyloxy)propyl] 2-(trimethylazaniumyl)ethyl phosphate