for the following products
Boc-L-Tyr(2-Br-Z)-OH | BOC-Tyr(2-Br-Z)-OH | Boc-Tyr(2-bromo-Z)-OH | N-alpha-tert-Butyloxycabonyl-O-(2-bromobenzyloxycarbonyl)-L-tyrosine | N-alpha-tert-Butyloxycarbonyl-o-(2-bromobenzyloxycarbonyl)-L-tyrosine and Boc-O-(2-bromo-Cbz)-L-Tyrosine