(2014/08/19)
benzyl chloroformate
benzyl ((2S,3R)-1-amino-3-hydroxy-1-oxobutan-2-yl)carbamate
acetic anhydride
N-benzyloxycarbonyl-L-treonine
(2R,3S)-4-amino-3-(2-(5-(1-(cyclohexylmethyl)-5-methyl-1H-1,2,3-triazole-4-carbonyl)-1-oxo-2,5-diazaspiro[3.4]octan-2-yl)acetamido)-4-oxobutan-2-yl acetate
benzyl 2-(2-(((2S,3R)-3-acetoxy-1-amino-1-oxobutan-2-yl)amino)-2-oxoethyl)-1-oxo-2,5-diazaspiro[3.4]octane-5-carboxylate