3-(6-amino-4-(ethoxycarbonyl)-5-methylpyrimidin-2-yl)-3(S)-azidopropionamide

methyl 3-(6-amino-4-(ethoxycarbonyl)-5-methylpyrimidin-2-yl)-3(R)-azidopropionate

ethyl 2-<1(R)-hydroxy-2-<((4R,5S)-4-methyl-5-phenyl-2-oxazolidinyl)carbonyl>ethyl>-6-amino-5-methylpyrimidine-4-carboxylate

ethyl 2-<1(S)-hydroxy-2-<((4S,5R)-4-methyl-5-phenyl-2-oxazolidinyl)carbonyl>ethyl>-6-amino-5-methylpyrimidine-4-carboxylate

(2S,3R)-2-({6-Amino-2-[(S)-1-((S)-2-tert-butoxycarbonylamino-2-carbamoyl-ethylamino)-2-carbamoyl-ethyl]-5-methyl-pyrimidine-4-carbonyl}-amino)-3-hydroxy-3-(1-trityl-1H-imidazol-4-yl)-propionic acid