[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an Alkylating Drug. The mechanism of action of lomustine is as an Alkylating Activity."}, {"from": "gpt", "value": "[C][C][C][C][Branch1][Branch1][C][C][Ring1][=Branch1][N][C][=Branch1][C][=O][N][Branch1][Ring2][C][C][Cl][N][=O]"}]