The molecule is a prostaglandin carboxylic acid anion that is the conjugate base of 19-hydroxyprostaglandin I2, obtained by deprotonation of the carboxy group; major species at pH 7.3. It derives from a prostaglandin I2(1-). It is a conjugate base of a 19-hydroxyprostaglandin I2.
(5Z)-5-[(3aR,4R,5R,6aS)-4-[(E,3S)-3,7-dihydroxyoct-1-enyl]-5-hydroxy-3,3a,4,5,6,6a-hexahydrocyclopenta[b]furan-2-ylidene]pentanoate