[{"from": "human", "value": "Provide a description of this molecule. [C][C][N][C][=Branch1][C][=O][C][Branch1][=Branch1][N][C][Ring1][=Branch1][=O][C][=C][C][=C][C][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is an imidazolidine-2,4-dione that is hydantoin substituted by ethyl and phenyl at positions 3 and 5, respectively. An antiepileptic, it is less toxic than phenytoin but also less effective. It has a role as an anticonvulsant."}]