1-Azaspiro[4.5]decane-2,8-dione
2-(Phenylsulfonyl)-6-oxo-2-azaspiro[3.3]heptane
tert-Butyl 8-oxo-5-azaspiro[2.5]octane-5-carboxylate
Spiro[2.3]hexan-4-one
Spiro[2.4]heptan-4-one
5-Benzyl-5-azaspiro[2.4]heptane-4,7-dione
Bicyclohexane-4,4-dione Monoethylene Ketal
3,3-Dimethyl-1,5-dioxaspiro[5.5]undecan-9-one
tert-Butyl 1-oxo-8-azaspiro[4.5]decane-8-carboxylate
7-Methyl-1,4-dioxaspiro[4.5]decan-8-one
Spiro[4.4]nonane-1,6-dione
Spiro[5.5]undecan-3-one
2-Benzhydryl-2-azaspiro[3.3]heptan-5-one
Benzyl 8-oxo-5-azaspiro[2.5]octane-5-carboxylate
3-Oxaspiro[5.5]undecan-9-one
Spiro[3.5]nonan-7-one
tert-Butyl 6-oxo-2-azaspiro[3.3]heptane-2-carboxylate
tert-Butyl 3-oxo-2,3-dihydrospiro[indene-1,4'-piperidine]-1'-carboxylate
tert-Butyl 9-oxo-3-azaspiro[5.5]undec-7-ene-3-carboxylate
tert-Butyl 5-oxo-2-azaspiro[3.3]heptane-2-carboxylate
