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-[(9S,11R)-epidioxy-(15S)-hydroxy-(5Z,13E)-prostadienoyl]-sn-glycero-3-phosphoethanolamine; major species at pH 7.3. It is a tautomer of a 2-[(9S,11R)-epidioxy-(15S)-hydroxy-(5Z,13E)-prostadienoyl]-sn-glycero-3-phosphoethanolamine.
2-azaniumylethyl [(2R)-3-hydroxy-2-[(Z)-7-[(1R,4S,5R,6R)-6-[(E,3S)-3-hydroxyoct-1-enyl]-2,3-dioxabicyclo[2.2.1]heptan-5-yl]hept-5-enoyl]oxypropyl] phosphate