[{"from": "human", "value": "Could you provide a description of this molecule? [C][S][=Branch1][C][=O][=Branch1][C][=O][O][C][C][C][NH2+1][C][C][C][O][S][=Branch1][C][=O][=Branch1][C][=O][C].[Cl-1]"}, {"from": "gpt", "value": "The molecule is an alkylsulfonate. Yoshi-864 alkylates and crosslinks DNA, thereby inhibiting DNA replication. (NCI04)"}]