Nα-(tert-butoxycarbonyl)-Nβ-[1-amino-3(S)-(4-amino-6-carboxy-5-methylpyrimidin-2-yl)propion-3-yl]-(S)-β-aminoalanine tert-butyl ester

Nα-(tert-butoxycarbonyl)-Nβ-[1-amino-3(S)-(4-amino-6-carboethoxy-5-methylpyrimidin-2-yl)propion-3-yl]-(S)-β-aminoalanine tert-butyl ester

ethyl 4-azido-2-(hydroxymethyl)-5-methylpyrimidine-6-carboxylate

tert-butyl 3-azido-(2S)-[(tert-butoxycarbonyl)amino]propionate

Nα-(tert-butoxycarbonyl)-Nβ-[3(S)-(4-amino-6-carboethoxy-5-methylpyrimidin-2-yl)-1-[(4S,5R)-4-methyl-5-phenyl-2-oxazolidinyl]-2-methylthiopropion-3-yl]-(S)-β-aminoalanine tert-butyl ester

6-amino-4-(ethoxycarbonyl)-5-methylpyrimidine-2-carboxaldehyde

ethyl 6-chloro-2-formyl-5-methylpyrimidine-4-carboxylate

tert-butyl(2S)-[(tert-butoxycarbonyl)amino]-3-phenylmethanesulfonyloxypropionate