[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. Urethane, formerly marketed as an inactive ingredient in Profenil injection, was determined to be carcinogenic and was removed from the Canadian, US, and UK markets in 1963."}, {"from": "gpt", "value": "[C][C][O][C][=Branch1][C][=O][N]"}]