CAS 129972-45-8 appears in our catalog under these names: Boc-pen(acm)-oh, 95%, Boc-Pen(Acm)-OH, Boc-Pen(Acm)-OH, 99%, (R)-3-((Acetamidomethyl)thio)-2-((tert-butoxycarbonyl)amino)-3-methylbutanoic acid, 99%, Boc-S-acetamidomethyl-L-penicillamine, 99%. Offered by: Combi-blocks, MedChemExpress, Ambeed, Chemat, BLDpharm. Available pack sizes: 250mg, 1g, 5 g, 250 mg, 1 g, 5g, 25g.