for the following products
(2S)-2-{[(benzyloxy)carbonyl]amino}-3-(tert-butoxy)propanoic acid | N-alpha-Benzyloxycarbonyl-o-tert-butyl-L-serine | N-Carbobenzoxy-O-tert-Butyl-L-serine | N-Cbz-O-tert-Butyl-L-serine | Z-L-Ser(tBu)-OH | Z-Ser(tBu)-OH and Z-Ser(But)-OH
