The molecule is a phosphatidylcholine 42:1 in which the acyl groups specified at positions 1 and 2 are (9Z)-octadecenoyl and tetracosanoyl respectively. It derives from a tetracosanoic acid and an oleic acid.
[(2R)-3-[(Z)-octadec-9-enoyl]oxy-2-tetracosanoyloxypropyl] 2-(trimethylazaniumyl)ethyl phosphate