The molecule is a 1-acyl-sn-glycero 3-phospho-(1'-sn-glycerol)(1-) in which the acyl group is specified as 9Z-octadecenoyl; major species at pH 7.3. It is a conjugate base of a 1-(9Z-octadecenoyl)-sn-glycero-3-phospho-(1'-sn-glycerol).
[(2S)-2,3-dihydroxypropyl] [(2R)-2-hydroxy-3-[(Z)-octadec-9-enoyl]oxypropyl] phosphate