The molecule is a 3-sn-phosphatidyl-L-serine in which the acyl substituents at positions 1 and 2 are specified as stearoyl and arachidonoyl respectively. It derives from an arachidonic acid and an octadecanoic acid. It is a conjugate acid of a 1-stearoyl-2-arachidonoyl-sn-glycero-3-phosphoserine(1-).
(2S)-2-amino-3-[hydroxy-[(2R)-2-[(5Z,8Z,11Z,14Z)-icosa-5,8,11,14-tetraenoyl]oxy-3-octadecanoyloxypropoxy]phosphoryl]oxypropanoic acid