The molecule is a prostaglandin carboxylic acid anion that is the conjugate base of 20-hydroxyprostaglandin E2, obtained by deprotonation of the carboxy group; major species at pH 7.3. It derives from a prostaglandin E2(1-). It is a conjugate base of a 20-hydroxyprostaglandin E2.
(Z)-7-[(1R,2R,3R)-2-[(E,3S)-3,8-dihydroxyoct-1-enyl]-3-hydroxy-5-oxocyclopentyl]hept-5-enoate