[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][N][Branch1][=N][C][C][N][Ring1][=Branch1][C][=Branch1][C][=O][C][C][Br][C][=Branch1][C][=O][C][C][Br]"}, {"from": "gpt", "value": "An antineoplastic agent that acts by alkylation."}]