The molecule is an oxo monocarboxylic acid anion that is the conjugate base of 5-hydroxy-3-[(3aS,4S,5R,7aS)-7a-methyl-1,5-dioxo-octahydro-1H-inden-4-yl]propanoate, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is an oxo monocarboxylic acid anion and a hydroxy monocarboxylic acid anion. It is a conjugate base of a 3-[(3aS,4S,5R,7aS)-5-hydroxy-7a-methyl-1,5-dioxo-octahydroinden-4-yl]propanoic acid.
3-[(3aS,4S,5R,7aS)-5-hydroxy-7a-methyl-1-oxo-3,3a,4,5,6,7-hexahydro-2H-inden-4-yl]propanoate