The molecule is a 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at positions 1 and 2 are specified as octadecanoyl and pentanoyl respectively. It derives from an octadecanoic acid and a valeric acid.
[(2R)-3-octadecanoyloxy-2-pentanoyloxypropyl] 2-(trimethylazaniumyl)ethyl phosphate