[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a natural product found in Parthenium integrifolium, Erigeron breviscapus, and Erigeron annuus with data available."}, {"from": "gpt", "value": "[C][=C][O][C][=C][Branch1][Branch1][C][Ring1][=Branch1][=O][O]"}]