(R)-(R)-1-((benzyloxy)carbonyl)pyrrolidine-2-carboxylic (isobutyl carbonic) anhydride

tert-butyl methyl((S)-1-oxo-1-(((S)-2-oxo-2-((S)-2-(5-phenylimidazo[1,2-a]pyridin-2-yl)pyrrolidin-1-yl)-1-(tetrahydro-2H-pyran-4-yl)ethyl)amino)propan-2-yl)carbamate

racemic Cbz-pyranylglycine methyl ester

benzyl (S)-2-(5-bromoimidazo[1,2-a]pyridin-2-yl)pyrrolidine-1-carboxylate

benzyl (S)-2-(5-phenylimidazo[1,2-a]pyridin-2-yl)pyrrolidine-1-carboxylate