for the following products
Boc-L-Tyr(Bzl)-OH | Boc-Tyr(Bzl)-OH | N-alpha-tert-Butyloxycabonyl-O-benzyl-L-tyrosine | N-alpha-tert-Butyloxycarbonyl-O-benzyl-L-tyrosine | N-tert-Butoxycarbonyl-O-benzyl-L-tyrisine(Boc-tyr(bzl)-oh) and Boc-O-Benzyl-L-tyrosine