[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is an alkylsulfonate alkylating agent that cross-links with DNA, causing inhibition of DNA synthesis."}, {"from": "gpt", "value": "[C][S][=Branch1][C][=O][=Branch1][C][=O][O][C][C][C][N][C][C][C][O][S][=Branch1][C][=O][=Branch1][C][=O][C]"}]