[{"from": "human", "value": "Provide a description of this molecule. [C][C][C][C][N][Branch1][=Branch1][C][C][C][C][O][N][=O]"}, {"from": "gpt", "value": "The molecule is a nitrosamine that has butyl and 4-hydroxybutyl substituents. In mice, it causes high-grade, invasive cancers in the urinary bladder, but not in any other tissues. It has a role as a carcinogenic agent. It is a nitrosamine and a primary alcohol."}]