for the following products
2-[[9H-Fluoren-9-ylmethoxy(oxo)methyl]-methylamino]-3-[(2-methylpropan-2-yl)oxy]butanoic acid | Fmoc-L-MeThr(tBu)-OH | Fmoc-N-Me-Thr(tBu)-OH | N-alpha-(9-Fluorenylmethyloxycarbonyl)-N-alpha-methyl-O-tert-butyl-L-threonine and N-Fmoc-N-Methyl-o-tert-butyl-L-threonine
