[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a cembrane diterpenoid obtained from tobacco and shown to have antitumour-promoting activity. It has a role as an antineoplastic agent."}, {"from": "gpt", "value": "[C][/C][=C][\\C][C][/C][=Branch2][Ring1][=N][=C][/C@@H1][Branch2][Ring1][#Branch1][C][C@][Branch1][#C][/C][=C][/C@@H1][Branch1][Branch1][C][C][/-Ring1][=C][C][Branch1][C][C][C][Branch1][C][C][O][O][/C]"}]