title: 2,2,7,7-Tetra-methyl-1,2,3,4,5,6,7,8-octa-hydro-acridine-1,8-dione.
abstract: The whole molecule of the title compound, C17H21NO2, is generated by twofold rotational symmetry. The N atom and the C and H atoms in position 4 of the pyridine ring lie on the twofold axis. The cyclohexene ring has a sofa conformation with the CH2 C atom adjacent to the dimethyl-substituted C atom displaced by 0.5949 (16) Å from the mean plane of the other five C atoms. In the crystal, weak C-H⋯O inter-actions link the mol-ecules into chains parallel to the a axis. In addition, π-π stacking inter-actions [centroid-centroid distance = 3.8444 (7) Å] contribute to the stabilization of the crystal structure.
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: Rahime
authors.initials: R
authors.lastname: Simsek
authors.forename: Ahmed
authors.initials: A
authors.lastname: El-Khouly
authors.forename: Cihat
authors.initials: C
authors.lastname: Safak