The molecule is a dicarboxylic acid dianion obtained by deprotonation of both carboxy groups of gypsogenic acid; major species at pH 7.3. It is a conjugate base of a gypsogenic acid.
(3S,4S,4aR,6aR,6bS,8aS,12aS,14aR,14bR)-3-hydroxy-4,6a,6b,11,11,14b-hexamethyl-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicene-4,8a-dicarboxylate