The title compound, C20H20Br2N 4O7, is an inter-mediate for mol-ecular clips. The seven- and six-membered rings have chair conformations, while the five-membered rings adopt envelope conformations. In the crystal structure, weak C - H⋯O and C - H⋯Br inter-actions link the molecules into a three-dimensional network. The eth-oxy and ethyl groups are disordered over two orientations, with occupancy ratios of 0.735 (16):0.265 (16) and 0.51 (...
