title: Diethyl 6,9,17,20-tetra-bromo-2,13-di-oxo-hexa-cyclo-[10.10.2.0.0.0.0]tetra-cosa-5,7,9,16,18,20-hexa-ene-23,24-dicarboxyl-ate.
abstract: In the title mol-ecule, C(26)H(22)Br(4)N(4)O(6), the dihedral angle between the aromatic rings is 30.0 (1)°. One ethyl fragment is disordered between two positions in a 1:1 ratio. The crystal packing exhibits weak inter-molecular C-H⋯O hydrogen bonds and short Br⋯O contacts of 3.349 (6) Å.
authors.affiliation: Key Laboratory of Pesticides and Chemical Biology of the Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China.
authors.forename: Yanping
authors.initials: Y
authors.lastname: Zhu
authors.forename: Yan
authors.initials: Y
authors.lastname: Chen
authors.forename: Yichong
authors.initials: Y
authors.lastname: Sun