[{"from": "human", "value": "Provide a description of this molecule. [C][C][=Branch2][Branch1][Branch2][=C][C][C][C@@][Branch2][Ring2][S][C][C][C@@][Branch2][Ring2][=Branch2][C@H1][C][C][C@@H1][C@@][Branch2][Ring1][C][C@@][Ring1][=Branch1][Branch1][N][C][C][C@][Ring1][#Branch2][Branch1][Ring2][C][Ring1][=C][C][C][C][C][C@@H1][Branch1][Branch2][C][Ring1][=N][Branch1][C][C][C][O][Ring1][#C][C][C][C]"}, {"from": "gpt", "value": "The molecule is a pentacyclic triterpenoid that is perhydrochrysene which is substituted by methyl groups at positions 1, 1, 4bbeta, 6aalpha, 8beta and 10abeta positions, by a 4-methylpent-3-enyl group at the 8alpha position, and with a beta-oxygen bridge between the 2 and the 4a positions."}]