CAS 1540034-11-4 appears in our catalog under these names: tert-Butyl 4-oxo-1-azaspiro(4.4)nonane-1-carboxylate, 97%, tert-Butyl 4-oxo-1-azaspiro(4.4)nonane-1-carboxylate, tert-Butyl 4-oxo-1-azaspiro[4.4]nonane-1-carboxylate, 97%, 97%, Tert-butyl4-oxo-1-azaspiro[4.4]nonane-1-carboxylate, 97%. Offered by: AmBeed, Biosynth, Chemat, Fluorochem. Available pack sizes: 10g, 5g, 250mg, 2,5g, 100mg, 500mg, 1g.