The molecule is a prostaglandin carboxylic acid anion that is the conjugate base of 6-oxoprostaglandin E1, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a 6-oxoprostaglandin E1.
7-[(1R,2R,3R)-3-hydroxy-2-[(E,3S)-3-hydroxyoct-1-enyl]-5-oxocyclopentyl]-6-oxoheptanoate