CAS 19898-39-6 appears in our catalog under these names: Z-Tyr-nh2, 95%, Z–Tyr–NH2, (S)-Benzyl (1-amino-3-(4-hydroxyphenyl)-1-oxopropan-2-yl)carbamate 98%, Z-Tyr-NH2, 98%, 98%. Offered by: Combi-blocks, GLPBio, Ambeed, Chemat. Available pack sizes: 1g, 25g, 5g, 250mg.