title: Di-tert-butyl 2,6,11-trioxo-2,3-dihydro-1H-anthra[1,2-d]imidazole-1,3-diacetate.
abstract: The fused-ring system of the title compound, C(27)H(28)N(2)O(7), which comprises one five- and three six-membered rings, is approximately planar (r.m.s. deviation = 0.133 Å), the system being buckled along the axis passing through the O atoms of the anthraquinone portion of the mol-ecule. Within the anthraquinone portion, the two benzene rings are aligned at 7.3 (2)°. In the crystal, one of the tert-butyl groups is disordered over two sets of sites in a 1:1 ratio. Weak inter-molecular C-H⋯O hydrogen bonding is present in the crystal structure.
authors.forename: Zahra
authors.initials: Z
authors.lastname: Afrakssou
authors.forename: Yousef Kandri
authors.initials: YK
authors.lastname: Rodi
authors.forename: Natalie
authors.initials: N
authors.lastname: Saffon
authors.forename: El Mokhtar
authors.initials: el M
authors.lastname: Essassi
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng