[{"from": "human", "value": "What can you tell me about this molecule? [C][=C][C][=Branch1][S][=C][C][=C][Ring1][=Branch1][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O][N][N][Branch1][Ring2][C][C][Cl][C][C][Cl]"}, {"from": "gpt", "value": "The molecule is the isomeric form of melphalan, with alkylating activity. Sarcolysin crosslinks DNA, thereby causing an inhibition in DNA replication and eventually a reduction in cellular proliferation."}]