Synonyms: | tert-Butyl 5-oxo-5,7-dihydrospiro[cyclopenta[b]pyridine-6,4'-piperidine]-1'-carboxylate;Spiro[6H-cyclopenta[b]pyridine-6,4'-piperidine]-1'-carboxylic acid, 5,7-dihydro-5-oxo-, 1,1-dimethylethyl ester;tert-Butyl 5-oxo-5,7-dihydrospiro[cyclopenta[b]pyridine-6,4' |