[{"from": "human", "value": "Describe this molecule. [C][C@][Branch2][Ring2][Ring1][C][C][C@@H1][C][=Branch2][Ring1][Branch2][=C][C][C@@H1][C@@][Ring1][=Branch1][Branch1][#C][C][C][C][C@][Ring1][=Branch1][Branch1][C][C][C][=Branch1][C][=O][O-1][C][C][Ring2][Ring1][Ring1][C][=C]"}, {"from": "gpt", "value": "The molecule is a monocarboxylic acid anion resulting from the deprotonation of 9beta-pimara-7,15-dien-19-oic acid; the major species at pH 7.3 It is a conjugate base of a 9beta-pimara-7,15-dien-19-oic acid."}]