[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][C][C][C][C][N][C][=Branch1][C][=O][N][C][=C][Branch1][#Branch2][C][=Branch1][C][=O][N][C][Ring1][#Branch1][=O][F]"}, {"from": "gpt", "value": "The molecule is a derivative of fluorouracil, and is an antineoplastic agent that has been used in the treatment of breast and colorectal cancer. Carmofur has been known to induce leukoencephalopathy."}]