for the following products
N-[(1,1-Dimethylethoxy)carbonyl]-N-methyl-glycine [2-(methylamino)-3-pyridinyl]methyl ester | [2-(Methylamino)-3-pyridyl]methyl 2-[boc(methyl)amino]acetate and 2-(Methylamino)pyridin-3-yl)methyl 2-((tert-butoxycarbonyl)(methyl)amino)acetate
