The molecule is a 2-acyl-sn-glycero-3-phosphoethanolamine zwitterion obtained by transfer of a proton from the phosphate to the amino group of 2-[(5Z,13E,15S)-11alpha,15-dihydroxy-9-oxoprosta-5,13-dien-1-oyl]-sn-glycero-3-phosphoethanolamine; major species at pH 7.3. It is a tautomer of a 2-[(5Z,13E,15S)-11alpha,15-dihydroxy-9-oxoprosta-5,13-dien-1-oyl]-sn-glycero-3-phosphoethanolamine.
2-azaniumylethyl [(2R)-3-hydroxy-2-[(Z)-7-[(1R,2R,3R)-3-hydroxy-2-[(E,3S)-3-hydroxyoct-1-enyl]-5-oxocyclopentyl]hept-5-enoyl]oxypropyl] phosphate