The molecule is a 1-acyl-sn-glycero-3-phospho-(1'-sn-glycerol)(1-) in which the acyl group is specified as hexadecanoyl (palmitoyl); major species at pH 7.3. It is a conjugate base of a 1-hexadecanoyl-sn-glycero-3-phospho-(1'-sn-glycerol).
[(2S)-2,3-dihydroxypropyl] [(2R)-3-hexadecanoyloxy-2-hydroxypropyl] phosphate