[{"from": "human", "value": "What can you tell me about this molecule? [C][=C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O][P][=Branch1][C][=O][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O-1]"}, {"from": "gpt", "value": "The molecule is trianion of 1-carboxyvinyl carboxyphosphonate arising from deprotonation of the carboxy and phosphonate groups; major species at pH 7.3. It is a dicarboxylic acid dianion and an organophosphonate oxoanion. It is a conjugate base of a 1-carboxyvinyl carboxyphosphonate."}]