[{"from": "human", "value": "Provide a description of this molecule. [C][N][C][C][C][=C][C][=Branch2][=Branch1][C][=C][C][=C][Ring1][=Branch1][C@@H1][Ring1][#Branch2][C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][C][=C][Branch2][Ring2][#Branch1][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][C@H1][C][=C][Branch1][Branch1][O][Ring2][Ring1][#Branch1][C][=Branch1][S][=C][Branch1][O][C][=C][Ring1][#Branch1][C][C][N][Ring1][O][C][O][C][O][C][O][C][O][C]"}, {"from": "gpt", "value": "The molecule is a natural, bis-benzylisoquinoline alkaloid isolated from the root of the plant Radix stephania tetrandrae.  Tetrandrine non-selectively inhibits calcium channel activity and induces G1 blockade of the G1 phase of the cell cycle and apoptosis in various cell types, resulting in immunosuppressive, anti-proliferative and free radical scavenging effects. This agent also increases glucose utilization by enhancing hepatocyte glycogen synthesis, resulting in the lowering of plasma glucose. (NCI04)"}]