[{"from": "human", "value": "Describe this molecule. [C][C@@H1][C@][Branch2][Branch1][#Branch2][C][C][C@H1][C@][Branch1][=N][C@@H1][Ring1][=Branch1][C][C][C][=Branch1][C][=O][O][Ring1][N][Branch2][Ring2][Ring2][C][C][C@@][Branch2][Ring1][=N][C@@][Ring1][N][Branch2][Ring1][=Branch1][C][C][C@@][Branch1][S][C@H1][Ring1][=Branch1][C][C][Branch1][Branch1][C][C][Ring1][=Branch1][Branch1][C][C][C][C][C][C][C][C]"}, {"from": "gpt", "value": "The molecule is a pentacyclic triterpenoid isolated from the leaves of Garcia parviflora. It is a terpene lactone, a pentacyclic triterpenoid and an epsilon-lactone. It is functionally related to a friedelin."}]