[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an indole alkaloid with formula C21H24N2O3. It is a biosynthetic precursor for a variety of monoterpenoid indole alkaloids. It has a role as a plant metabolite. It is an indole alkaloid, a methyl ester, an organic heterotetracyclic compound and an enol."}, {"from": "gpt", "value": "[C][/C][=C][/C][N][C][C][C][=C][Branch2][Ring1][Ring1][C@@H1][Ring1][=Branch1][C][C@@H1][\\-Ring1][#Branch2][/C][=Branch1][Ring1][=C][/O][/C][=Branch1][C][=O][O][C][N][C][=C][C][=C][C][=C][Ring2][Ring1][Ring1][Ring1][=Branch1]"}]