[{"from": "human", "value": "Could you provide a description of this molecule? [C][Branch1][#C][/C][=Branch1][#Branch1][=C][/P+1][=Branch1][C][=O][O][/C][=Branch1][C][=O][O][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a dicarboxylic acid that is succinic acid substituted at position 2 by a phosphinomethylidene group. It is a member of phosphinic acids and a dicarboxylic acid. It is functionally related to a succinic acid. It is a conjugate acid of a 2-(phosphinatomethylidene)succinate(3-)."}]