for the following products
Fmoc-D-Thr(But)-OH | Fmoc-D-Thr(tBu)-OH | N-alpha-(9-Fluorenylmethyloxycarbonyl)-O-tert-butyl-D-threonine | N-S-Fmoc-o-tert-Butyl-D-threonine | O-(1,1-Dimethylethyl)-N-[(9H-fluoren-9-ylmethoxy)carbonyl]-D-threonine and Fmoc-O-tert-Butyl-D-threonine
