CAS 4033-40-3 appears in our catalog under these names: Ac-Asn-OH, 98%, Acetyl-L-asparagine, N2-Acetyl-L-asparagine, (S)-2-acetamido-4-amino-4-oxobutanoic acid/ 99.79% (existing batch purity), Ac–Asn–OH. Offered by: Combi-blocks, Creative Peptides, TRC, TargetMol, GLPBio. Available pack sizes: 1g, 25g, 5g, on request, 500mg, 10mg, 25mg, 50mg.