3,3,3',3'-Tetramethyl-2,2',3,3'-tetrahydro-1,1'-spirobi[indene]-6,6'-diol

tert-Butyl 2-azaspiro[3.3]heptan-6-ylcarbamate

6,6-Difluoro-2-azaspiro[3.3]heptane

Spiro[3.3]heptan-2-amine hydrochloride

tert-Butyl 3-hydroxy-1-oxa-7-azaspiro[4.4]nonane-7-carboxylate

tert-Butyl 6-oxo-1-azaspiro[3.3]heptane-1-carboxylate

6-Amino-2-thiaspiro[3.3]heptane 2,2-dioxide

tert-Butyl 2-thia-6-azaspiro[3.3]heptane-6-carboxylate 2,2-dioxide

tert-Butyl 6-(aminomethyl)-2-azaspiro[3.3]heptane-2-carboxylate

tert-Butyl 6-(hydroxymethyl)-2-azaspiro[3.3]heptane-2-carboxylate