tert-Butyl 3-oxo-2,3-dihydrospiro[indene-1,4'-piperidine]-1'-carboxylate;N-BOC-1-[4-SPIRO-PIPERIDINE]-3-INDANONE;Spiro[1H-indene-1,4'-piperidine]-1'-carboxylic acid, 2,3-dihydro-3-oxo- 1,1-dimethyl ethyl ester;tert-butyl 3-oxospiro[2H-indene-1,4'-piperidine]-1'-carboxylate;Caboxylate;1'-Boc-3-oxo-2,3-dihydrospiro[indene-1,4'-piperidine];tert-butyl 3-oxo-2,3-dihydrospiro[indene-1,4'-piperidine]-1'-car;TERT-BUTYL 3-OXO-2,3-DIHYDROSPIRO[INDENE-1,4'-PIPERIDINE]-1'-CARBOXYLATE;2,3-Dihydro-3-oxo-spiro[1H-indene-1,4'-piperidine]-1'-carboxylic acid tert-butyl ester;2,3-dihydro-3-oxo-spiro[1H-indene-1,4'-piperidine]-1'-carboxylic acid 1,1-dimethylethyl ester;Spiro[1H-indene-1,4'-piperidine]-1'-carboxylic acid, 2,3-dihydro-3-oxo- 1,1-diMethyl ethyl ester