[{"from": "human", "value": "Provide a description of this molecule. [C][O][C][=Branch1][C][=O][C@H1][C@H1][Branch2][Ring1][S][C][C][C@@H1][C@@H1][Ring1][=Branch1][C][C@@H1][C][=C][Branch1][=Branch2][C][C][N][Ring1][=Branch1][C][Ring1][#Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][N][Ring1][=N][O]"}, {"from": "gpt", "value": "The molecule is a natural product found in Alstonia mairei and Catharanthus trichophyllus with data available."}]