[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a natural product found in Vincetoxicum glaucescens, Vincetoxicum atratum, and Cynanchum wilfordii with data available."}, {"from": "gpt", "value": "[C][C@@H1][Branch1][=N][C@@H1][Branch1][=Branch2][C@@H1][Branch1][Ring2][C][C][=O][O][C][O][O]"}]