1-Piperidinecarboxylic acid, 4-(2,3-dihydro-2-oxo-1H-imidazo[4,5-b]pyridin-1-yl)-, 1,1-dimethylethyl ester
2-Oxo-1-(1-(tert-butoxycarbonyl)piperidin-4-yl)-2,3-dihydro-1H-imidazo[4,5-b]pyridine
tert-Butyl 4-(2-oxo-2,3-dihydro-1H-imidazo[4,5-b]pyridin-1-yl)piperidine-1-carboxylate