The molecule is a phosphatidylcholine 38:0 in which the acyl groups specified at positions 1 and 2 are octadecanoyl and eicosanoyl respectively. It derives from an icosanoic acid and an octadecanoic acid.
[(2R)-2-icosanoyloxy-3-octadecanoyloxypropyl] 2-(trimethylazaniumyl)ethyl phosphate