for the following products
(2S,3R)-3-(Benzyloxy)-2-((tert-butoxycarbonyl)amino)butanoic acid | Boc-L-Thr(Bzl)-OH | Boc-Thr(Bzl)-OH | N-a-BOC-(O-Bzl)-L-Thr | N-alpha-tert-Butyloxycarbonyl-O-benzyl-L-threonine | N-tert-Butoxacarbonyl-o-benzyl-L-threonine | N-[(1,1-Dimethylethoxy)carbonyl]-O-(phenylmethyl)-L-threonine and Boc-O-Benzyl-L-threonine
