CAS 80971-82-0 appears in our catalog under these names: Boc-tyr(ac)-oh, 95%, (S)-3-(4-Acetoxyphenyl)-2-((tert-butoxycarbonyl)amino)propanoic acid, 97%, Boc–Tyr(Ac)–OH, L-Tyrosine, O-acetyl-N-[(1,1-dimethylethoxy)carbonyl]-, 98%, 98%. Offered by: Combi-blocks, AmBeed, GLPBio, Chemat. Available pack sizes: 1g, 5g, 250mg, 500mg.