Synonyms:
tert-butyl 5-methoxy-2-oxospiro[indoline-3,4'-piperidine]-1'-carboxylate ; 1,2-dihydro-5-methoxy-2-oxo-spiro[3h-indole-3,4'-piperidine]-1'-carboxylic acid 1,1-dimethylethyl ester ; 1'-boc-1,2-dihydro-5-methoxy-2-oxo-spiro[3h-indole-3,4'-piperidine] ; tert-butyl 5-methoxy-2-oxo-1,2-dihydrospiro[indole-3,4'-piperidine]-1'-carboxylate