[{"from": "human", "value": "Describe this molecule. [C][C][Branch2][Ring1][=Branch1][C][C][Branch1][#C][C][=Branch1][C][=O][N][C][=Branch1][C][=O][N][C][Ring1][Branch2][=O][C][C][=C][O]"}, {"from": "gpt", "value": "The molecule is a derivative of barbiturates, which has been used to treat migraines. Proxibarbal was approved in France but was withdrawn from the market due to the risk of inducing immunoallergic thrombocytopenia."}]