1,1-Dimethylethyl 7-bromo-2,3-dihydro-3-oxospiro[1H-indene-1,4′-piperidine]-1′-carboxylate

tert-Butyl 7-bromo-3-oxo-2,3-dihydrospiro[indene-1,4'-piperidine]-1'-carboxylate