[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a methanesulfonate ester that is hexane-2,5-diol in which the hydrogens of the hydroxy groups are replaced by methanesulfonyl groups. It has a role as a mutagen and an alkylating agent."}, {"from": "gpt", "value": "[C][C][Branch1][S][C][C][C][Branch1][C][C][O][S][=Branch1][C][=O][=Branch1][C][=O][C][O][S][=Branch1][C][=O][=Branch1][C][=O][C]"}]