The molecule is a 1,2-di-octadecadienoyl-sn-glycero-3-phosphocholine in which the double bonds in each fatty acyl group are at positions 9 and 12 and have Z configuration. It derives from a linoleic acid.
[(2R)-2,3-bis[[(9Z,12Z)-octadeca-9,12-dienoyl]oxy]propyl] 2-(trimethylazaniumyl)ethyl phosphate