[{"from": "human", "value": "Describe this molecule. [C][Branch1][=C][C@H1][C][=Branch1][C][=O][N][C][=Branch1][C][=O][N][Ring1][#Branch1][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is an imidazolidine-2,4-dione having a carboxymethyl group at the 5-position. It is functionally related to a hydantoin. It is a conjugate acid of a L-5-carboxylatomethylhydantoin(1-)."}]