[{"from": "human", "value": "Generate a molecule based on this description. The molecule is less toxic than most other nitrogen mustards, it has been listed as a known carcinogen in the Fourth Annual Report on Carcinogens (NTP 85-002, 1985). (Merck Index, 11th ed)"}, {"from": "gpt", "value": "[C][=C][C][=Branch1][=C][=C][C][=C][Ring1][=Branch1][C][C][C][C][=Branch1][C][=O][O][N][Branch1][Ring2][C][C][Cl][C][C][Cl]"}]