The molecule is a prostaglandin carboxylic acid anion that is the conjugate base of prostaglandin B3, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a prostaglandin B3.
(Z)-7-[2-[(1E,3S,5Z)-3-hydroxyocta-1,5-dienyl]-5-oxocyclopenten-1-yl]hept-5-enoate