[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is dicarboxylate anion of (R)-2-(carboxymethyl)-5-oxo-2,5-dihydro-2-furoic acid. It is a conjugate base of a (R)-2-(carboxymethyl)-5-oxo-2,5-dihydro-2-furoic acid."}, {"from": "gpt", "value": "[C][=C][C@][Branch1][=Branch1][O][C][Ring1][Branch1][=O][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O-1]"}]