[{"from": "human", "value": "Provide a description of this molecule. [C][Branch1][P][C][=Branch1][C][=O][/C][=C][Branch1][Branch2][\\C][=C][/C][=Branch1][C][=O][O][/O][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is an oxodicarboxylic acid that is a tautomer of 4-maleylacetoacetic acid in which the carbonyl of the alpha,beta-unsaturated ketone moiety has tautomerised to the corresponding enol (the 2Z,4E isomer). It is an oxo dicarboxylic acid and an enol. It is a tautomer of a 4-maleylacetoacetic acid."}]