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