CAS 3338-34-9 appears in our catalog under these names: Z-Lys(boc)-osu, 96%, Z–Lys(Boc)–OSu, Z-Lys(Boc)-Osu, 98%, 98%, (S)-2,5-Dioxopyrrolidin-1-yl 2-(((benzyloxy)carbonyl)amino)-6-((tert-butoxycarbonyl)amino)hexanoate, 98%, Z-Lys(Boc)-OSu, 98%. Offered by: Combi-blocks, GLPBio, Chemat, Fluorochem, Ambeed. Available pack sizes: 1g, 25g, 5g, 100g.