CAS 3397-32-8 appears in our catalog under these names: Z-Phe-osu, 97%, Z–Phe–OSu, Z-L-Phe-OSu, Z-Phe-OSu, 98%, (S)-2,5-Dioxopyrrolidin-1-yl 2-(((benzyloxy)carbonyl)amino)-3-phenylpropanoate, 98%. Offered by: Combi-blocks, GLPBio, Iris Biotech, Ambeed, BLDpharm. Available pack sizes: 1g, 25g, 5g, 100g, 500g.