(4S,5R)-4-异丙基-5-甲氧基-1,3-恶唑烷-2-酮

di-tert-butyl dicarbonate

N-{3-[(N,N-dimethylaminophenyl)-4'-diazenyl]benzoyl}valine methyl ester

(R)-2-[1',2'-Bis(butoxycarbonyl)hydrazino]-3-methylbutanoic acid

di-tert-butyl (R)-1-(3-methyl-1-oxobutan-2-yl)hydrazine-1,2-dicarboxylate