CAS 474329-57-2 appears in our catalog under these names: tert-Butyl 4-(4-bromo-2-nitrophenyl)piperazine-1-carboxylate, 95%, TERT-BUTYL 4-(4-BROMO-2-NITROPHENYL)PIPERAZINE-1-CARBOXYLATE, 97%. Offered by: Combi-blocks, Chemat. Available pack sizes: 1g, 5g, 100mg.