[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is found in mushrooms. Toxin from the fungus Gyromitra esculenta. Freq. cause of mushroom poisoning Gyromitrin is a toxin and possible carcinogen present in most members of the fungal genus Gyromitra, most notably the false morel G. esculenta."}, {"from": "gpt", "value": "[C][/C][=N][\\N][Branch1][C][C][C][=O]"}]