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

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