The molecule is a prostaglandin carboxylic acid anion that is the conjugate base of prostaglandin G3, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a prostaglandin G3.
(Z)-7-[(1R,4S,5R,6R)-6-[(1E,3S,5Z)-3-hydroperoxyocta-1,5-dienyl]-2,3-dioxabicyclo[2.2.1]heptan-5-yl]hept-5-enoate