CAS 20431-58-7 appears in our catalog under these names: 4-(Dimethylamino)-4'-nitrochalcone, 95%, 4-(Dimethylamino)-4'-nitrochalcone, 97%, (E)-3-(4-(dimethylamino)phenyl)-1-(4-nitrophenyl)prop-2-en-1-one, 98%. Offered by: Combi-blocks, Chemat, Fluorochem. Available pack sizes: 250mg, 1g, 5g.