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tert-Butyl 7-oxo-2-azaspiro[3.5]nonane-2-carboxylate1363381-22-9100 % similar 1,1-Dimethylethyl 9-oxo-3-azaspiro[5.5]undecane-3-carboxylate873924-08-474 % similar tert-Butyl 6-oxo-2-azaspiro(3.3)heptane-2-carboxylate1181816-12-571 % similar 2-(tert-Butoxycarbonyl)-2,7-diazaspiro[3.5]nonane236406-55-667 % similar tert-Butyl 4-oxopiperidine-1-carboxylate79099-07-365 % similar tert-Butyl 2-oxo-6-azaspiro[3.4]octane-6-carboxylate203661-71-663 % similar 1,1-Dimethylethyl 2,6-diazaspiro[3.3]heptane-2-carboxylate1041026-70-361 % similar tert-Butyl 3-oxoazetidine-1-carboxylate398489-26-459 % similar N-Boc-hexahydro-1H-azepin-4-one188975-88-458 % similar tert-Butyl 2-oxo-7-azaspiro[3.5]nonane-7-carboxylate203661-69-258 % similar 3-Oxopyrrolidine-1-carboxylic acid tert-butyl ester101385-93-757 % similar tert-Butyl 6-hydroxy-2-azaspiro[3.3]heptane-2-carboxylate1147557-97-856 % similar tert-Butyl 6-amino-2-azaspiro[3.3]heptane-2-carboxylate1211586-09-256 % similar 1,1-Dimethylethyl 3,3-difluoro-1-azetidinecarboxylate1255666-59-156 % similar 3-Hydroxy-3-methyl-azetidine-1-carboxylic acid tert-butyl ester1104083-23-954 % similar tert-Butyl 2-oxa-6-azaspiro[3.5]nonane-6-carboxylate1245816-29-854 % similar tert-Butyl 2,8-diazaspiro[4.5]decane-2-carboxylate336191-17-454 % similar tert-Butyl 2,6-Diazaspiro(3.3)heptane-2-carboxylate Hemioxalate1041026-71-452 % similar 1,1-Dimethylethyl 1-pyrrolidinecarboxylate86953-79-951 % similar cis-tert-Butyl 5-oxohexahydrocyclopenta[c]pyrrole-2(1H)-carboxylate146231-54-151 % similar