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tert-Butyl 1-oxa-6-azaspiro(2.5)octane-6-carboxylate147804-30-6100 % similar 3-Oxo-1-oxa-8-aza-spiro[4.5]decane-8-carboxylic acid tert-butyl ester954236-44-366 % similar 7-Boc-2-oxa-7-azaspiro[3.5]nonane240401-27-866 % similar tert-Butyl 4,4-difluoropiperidine-1-carboxylate281652-10-663 % similar 1,1-Dimethylethyl 1-pyrrolidinecarboxylate86953-79-963 % similar 1-Boc-4-methyl-piperidin-4-OL406235-30-161 % similar 1,1-Dimethylethyl 1-piperidinecarboxylate75844-69-861 % similar tert-Butyl 2-oxo-7-azaspiro[3.5]nonane-7-carboxylate203661-69-259 % similar 1-Boc-4-(hydroxymethyl)-4-methyl-piperidine236406-21-659 % similar tert-Butyl 2,7-diazaspiro[3.5]nonane-7-carboxylate896464-16-759 % similar tert-Butyl 3,9-diazaspiro[5.5]undecane-3-carboxylate173405-78-258 % similar 1-Boc-4-formyl-4-methyl-piperidine189442-92-058 % similar 1,1-Dimethylethyl 9-oxo-3-azaspiro[5.5]undecane-3-carboxylate873924-08-458 % similar 1-Boc-4-spiro-[3-(2-pyrrolidinone)] piperidine268550-48-757 % similar N-Boc-diethanolamine103898-11-957 % similar N-Boc-N,N-bis(2-chloroethyl)amine118753-70-157 % similar 1-Boc-4-methylpiperazine53788-49-157 % similar tert-Butyl piperazine-1-carboxylate57260-71-657 % similar tert-Butyl 4-oxopiperidine-1-carboxylate79099-07-357 % similar 1-Boc-4-methylpiperidine-4-carboxylic acid189321-63-956 % similar