title: 7,9-Dichloro-6H,12H-indolo[2,1-b]quinazoline-6,12-dione.
abstract: There are two independent mol-ecules in the asymmetric unit of the title compound, C(15)H(6)Cl(2)N(2)O(2). The conjugated four-ring system is essentially planar in each mol-ecule [maximum deviation = 0.089 (2) Å]. In the crystal, weak inter-molecular C-H⋯Cl, C-H⋯O and C-H⋯·N inter-actions help to stabilize the packing.
authors.affiliation: Department of Chemistry & Biochemistry, University of Minnesota Duluth, 1039 University Drive, Duluth, MN 55812, USA.
authors.forename: Peter
authors.initials: P
authors.lastname: Grundt
authors.forename: Kelsi A
authors.initials: KA
authors.lastname: Douglas
authors.forename: Bogdana
authors.initials: B
authors.lastname: Krivogorsky
authors.forename: Victor N
authors.initials: VN
authors.lastname: Nemykin