In the molecule of the title compound. C30H30Br2N4O2. the piperazine ring adopts a chair conformation. The pyrrolidine rings that are fused to the piperazine ring adopt envelope conformations (in which the N atom represents the flap). https://www.diegojavierfares.com/mega-buy-Exedy-Stage-2-Cerametallic-Clutch-Kit-22-24-Civic-SI-hot-choice/