title: 3,3,6,6-Tetra-methyl-9-(1-methyl-1H-indol-2-yl)-1,2,3,4,5,6,7,8,9,10-deca-hydro-acridine-1,8-dione.
abstract: In the acridine system of the title mol-ecule, C26H30N2O2, both cyclo-hex-2-enone rings adopt sofa conformations. The indole ring system is essentially planar, with a maximum deviation of 0.017 (2) Å for a bridgehead C atom. An intra-molecular C-H⋯O hydrogen bond occurs. The mol-ecules assemble into C(6) chains in the crystal by way of N-H⋯O hydrogen bonds.
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: Ahmed
authors.initials: A
authors.lastname: El-Khouly
authors.forename: Cihat
authors.initials: C
authors.lastname: Safak
authors.forename: Rahime
authors.initials: R
authors.lastname: Simsek