[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a natural product found in Melodorum fruticosum and Uvaria siamensis with data available."}, {"from": "gpt", "value": "[C][O][C][=Branch1][C][=O][/C][=C][/C][=Branch2][Ring1][Ring2][=C][/C][=Branch1][C][=O][C][O][C][=Branch1][C][=O][C][=C][C][=C][C][=C][Ring1][=Branch1][/O]"}]