The molecule is a 1-acyl-sn-glycerophosphoserine in which the acyl group is specified as stearoyl (octadecanoyl). It derives from an octadecanoic acid. It is a conjugate acid of a 1-stearoyl-sn-glycero-3-phosphoserine(1-).
(2S)-2-amino-3-[hydroxy-[(2R)-2-hydroxy-3-octadecanoyloxypropoxy]phosphoryl]oxypropanoic acid