SMILES: C[C@@H]1CC[C@@H]2[C@]13CC([C@@H]([C@H]3C=C2C(=O)[O-])O)(C)C
Description: The molecule is a hydroxy monocarboxylic acid anion that is the conjugate base of pentalenic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a pentalenic acid.