138865-76-6 Boc-bgat Boc-val-ser(bzl)-gln-asn-tyr(brz)OH L-Tyrosine, N-(N2-(N2-(N-(N-((1,1-dimethylethoxy)carbonyl)-L-valyl)-O-(phenylmethyl)-L-seryl)-L-glutaminyl)-L-asparaginyl)-, (4-bromophenyl)methyl carbonate (ester) tert-Butyloxycarbonyl-valyl-benzylseryl-glutaminyl-asparaginyl-(brz)tyrosine