1239714-30-7 2'-Isobutyl-1'-oxo-1',4'-dihydro-2'H-spirocyclopentane-1,3'-isoquinoline-4'-carboxylic acid
1239714-26-1 2-Butyl-1'-methyl-1-oxo-1,4-dihydro-2H-spiroisoquinoline-3,4'-piperidine-4-carboxylic acid