The molecule is a 1-acyl-sn-glycero 3-phospho-(1'-sn-glycerol) in which the acyl group is specified as octadecanoyl (stearoyl). It is a conjugate acid of a 1-octadecanoyl-sn-glycero-3-phospho-(1'-sn-glycerol)(1-).
[(2R)-3-[[(2S)-2,3-dihydroxypropoxy]-hydroxyphosphoryl]oxy-2-hydroxypropyl] octadecanoate