[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][O][S][=Branch1][C][=O][=Branch1][C][=O][O][C]"}, {"from": "gpt", "value": "The molecule is the dimethyl ester of sulfuric acid. It has a role as an alkylating agent and an immunosuppressive agent."}]