Ethyl 2,7,7-trimethyl-4-(1-methyl-1H-indol-3-yl)-5-oxo-1,4,5,6,7,8- hexahydroquinoline-3-carboxylate

In the title molecule, C₂₄H₂₈N₂O ₃, the cyclohexene ring is in a sofa conformation and the 1,4-dihydropyridine ring is in a slight boat conformation. In the indole ring system, the pyrrole and benzene rings form a dihedral angle of 2.63 14;(7)°. In the crystal, N - HO hydrogen bonds connect the molecules into C(6) chains parallel to the b axis and pairs of weak C - HO hydrogen bonds link inversion-related chains into a ladder motif through R 2 ²(18) rings. A weak intramolecular C - HO hydrogen bond is also observed.