The molecule is a prostaglandin carboxylic acid anion that is the conjugate base of prostaglandin A3, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a prostaglandin A3.
(Z)-7-[(1R,2S)-2-[(1E,3S,5Z)-3-hydroxyocta-1,5-dienyl]-5-oxocyclopent-3-en-1-yl]hept-5-enoate