[{"from": "human", "value": "Describe this molecule. [C][C@H1][C@@H1][Branch2][Ring2][=Branch2][C@@H1][C][C@@H1][N][Ring1][=Branch1][C@@H1][C][Ring1][=Branch1][C@H1][Branch2][Ring1][Branch1][C@@][Branch1][Ring2][C][Ring1][Branch1][C][Ring1][Branch2][=N][C][=C][C][=C][C][=C][Ring1][#Branch2][Ring1][=Branch1][O][C][=Branch1][C][=O][C][C][=O]"}, {"from": "gpt", "value": "The molecule is an indole alkaloid having a ajmalan-type skeleton and characterised by a 17alpha-acetoxy group, a 21beta-methyl group, loss of the 1-methyl group with associated unsaturation at N(1)=C(2), and a 20alpha-formyl group in place of the 20beta-ethyl side-chain. It derives from a hydride of an ajmalan."}]