title: Ethyl 2,7,7-trimethyl-4-(1-methyl-1H-indol-3-yl)-5-oxo-1,4,5,6,7,8-hexa-hydro-quinoline-3-carboxyl-ate.
abstract: In the title mol-ecule, C24H28N2O3, the cyclo-hexene ring is in a sofa conformation and the 1,4-dihydro-pyridine ring is in a slight boat conformation. In the indole ring system, the pyrrole and benzene rings form a dihedral angle of 2.63 (7)°. In the crystal, N-H⋯O hydrogen bonds connect the mol-ecules into C(6) chains parallel to the b axis and pairs of weak C-H⋯O hydrogen bonds link inversion-related chains into a ladder motif through R2(2)(18) rings. A weak intra-molecular C-H⋯O hydrogen bond is also observed.
authors.affiliation: Department of Chemistry, Howard University, 525 College Street NW, Washington, DC 20059, USA ; Department of Physics, Faculty of Sciences, Erciyes University, 38039 Kayseri, Turkey.
authors.forename: Sema
authors.initials: S
authors.lastname: Oztürk Yildirim
authors.forename: Ray J
authors.initials: RJ
authors.lastname: Butcher
authors.forename: Miyase Gözde
authors.initials: MG
authors.lastname: Gündüz
authors.forename: Ahmed
authors.initials: A
authors.lastname: El-Khouly
authors.forename: Rahime
authors.initials: R
authors.lastname: Simşek
authors.forename: Cihat
authors.initials: C
authors.lastname: Safak