[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a natural product found in Huperzia serrata with data available."}, {"from": "gpt", "value": "[C][C][C][C][C][C][=Branch1][C][=O][C][C][Ring1][=Branch1][C][C][C][N][Branch1][#Branch1][C][Ring1][=Branch1][=C][Ring1][=C][C][C][Branch1][Ring2][C][Ring1][O][O]"}]