[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a triterpenoid saponin that consists of urs-11-ene substituted by an epoxy group across positions 13 and 28, a hydroxy group at position 16 and a alpha-L-rhamnopyranosyl-(1->2)-beta-D-glucopyranosyl-(1->2)-beta-D-fucopyranosyloxy residue at position 3 (the 3beta,16alpha stereoisomer). Isolated from the fruits of Bupleurum rotundifolium, it exhibits antiproliferative activity against cancer cells. It has a role as an antineoplastic agent and a plant metabolite. It is a bridged compound, a cyclic ether, a hexacyclic triterpenoid, a trisaccharide derivative and a triterpenoid saponin. It derives from a hydride of an ursane."}, {"from": "gpt", "value": "[C][C@@H1][C][C][C@@][C][O][C@][Branch1][Branch2][C@@H1][Ring1][Branch1][C@H1][Ring1][=Branch2][C][C][=C][C@@H1][C@][Branch2][Branch2][Ring2][C][C][C@@H1][Branch2][Ring1][S][C][Branch2][Ring1][Branch2][C@@H1][Ring1][=Branch1][C][C][C@][Ring1][#Branch2][Branch1][=N][C@@][Ring1][P][Branch1][#Branch1][C][C@H1][Ring2][Ring1][=Branch1][O][C][C][Branch1][C][C][C][O][C@H1][C@@H1][Branch1][S][C@H1][Branch1][N][C@H1][Branch1][Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][O][C@H1][C@@H1][Branch1][P][C@H1][Branch1][=N][C@@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][O][O][C@H1][C@@H1][Branch1][S][C@@H1][Branch1][N][C@H1][Branch1][Branch2][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][O][C]"}]