[{"from": "human", "value": "Please give me some details about this molecule. [C][Branch2][Ring1][Ring1][C][S][S][C][C][N][C][=Branch1][C][=O][N][Branch1][Ring2][C][C][Cl][N][=O][N][C][=Branch1][C][=O][N][Branch1][Ring2][C][C][Cl][N][=O]"}, {"from": "gpt", "value": "The molecule is a nitrosourea compound with alkylating activity. Ditiomustine crosslinks DNA, resulting in the inhibition of DNA replication and eventually cellular proliferation."}]