The molecule is a 1,2-diacyl-sn-glycero-3-phosphoethanolamine in which the 1- and 2-acyl groups are specified as hexadecanoyl (palmitoyl) and octadecanoyl (stearoyl) respectively. It is a tautomer of a 1-hexadecanoyl-2-octadecanoyl-sn-glycero-3-phosphoethanolamine zwitterion.
[(2R)-1-[2-aminoethoxy(hydroxy)phosphoryl]oxy-3-hexadecanoyloxypropan-2-yl] octadecanoate