[{"from": "human", "value": "Describe this molecule. [C][C@H1][C][C][C@@][Branch2][=Branch1][=Branch1][C@@][Branch2][Branch1][P][C][C@][Branch2][Branch1][O][C@][Branch2][Branch1][=Branch1][C@][Branch2][Ring2][#Branch2][C@H1][Branch2][Ring1][#Branch2][C@@][Ring1][#Branch1][Branch2][Ring1][Ring1][C@][Ring1][Branch1][Branch1][=N][C@][Ring1][#Branch2][Branch1][Branch1][C@@H1][Ring1][=C][O][O][Ring1][#Branch2][O][O][O][C][=Branch1][C][=O][C][=C][C][=C][N][Ring1][Branch1][Branch1][=Branch1][C][Branch1][C][C][C][O][C][O][C][O]"}, {"from": "gpt", "value": "The molecule is a poisonous alkaloid found in the South American plant Ryania speciosa (Flacourtiaceae). It was originally used as an insecticide. The compound has extremely high affinity to the open-form ryanodine receptor, a group of calcium channels found in skeletal muscle, smooth muscle, and heart muscle cells. It binds with such high affinity to the receptor that it was used as a label for the first purification of that class of ion channels and gave its name to it."}]