CC1(C)C[C@](C)(C(=O)O)C[C@@H]1C(=O)O mol38587 0_1 CC1(C)C[C@](C)(C(=O)[O-])C[C@@H]1C(=O)O mol38587 -1_1 CC1(C)C[C@](C)(C(=O)O)C[C@@H]1C(=O)[O-] mol38587 -1_2