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tert-Butyl 2,2-dimethyl-4-oxopiperidine-1-carboxylate346593-03-158 % similar tert-Butyl 2,4-dioxopiperidine-1-carboxylate845267-78-958 % similar 3-Oxo-1-oxa-8-aza-spiro[4.5]decane-8-carboxylic acid tert-butyl ester954236-44-358 % similar tert-Butyl 4-hydroxypiperidine-1-carboxylate109384-19-257 % similar cis-tert-Butyl 5-oxohexahydrocyclopenta[c]pyrrole-2(1H)-carboxylate146231-54-157 % similar tert-Butyl 1-oxa-6-azaspiro(2.5)octane-6-carboxylate147804-30-657 % similar N-Boc-hexahydro-5-oxocyclopenta[C]pyrrole148404-28-857 % similar 4-Chloro-piperidine-1-carboxylic acid tert-butyl ester154874-94-957 % similar tert-Butyl 4-bromopiperidine-1-carboxylate180695-79-857 % similar 7-Boc-2-oxa-7-azaspiro[3.5]nonane240401-27-857 % similar tert-Butyl 4-iodopiperidine-1-carboxylate301673-14-357 % similar 1-Boc-4-methyl-piperidin-4-OL406235-30-157 % similar tert-Butyl 4-aminopiperidine-1-carboxylate87120-72-757 % similar tert-Butyl 2-oxo-6-azaspiro[3.4]octane-6-carboxylate203661-71-657 % similar N-Boc-3-methylene-piperidine276872-89-057 % similar N-(tert-Butoxycarbonyl)-2,5-dihydro-1H-pyrrole73286-70-156 % similar tert-Butyl 1,4-diazepane-1-carboxylate112275-50-056 % similar 1-tert-Butoxycarbonyl-4-piperidinecarboxaldehyde137076-22-356 % similar 4-(2-Amino-ethyl)-piperazine-1-carboxylic acid tert-butyl ester192130-34-056 % similar 4-Thiocarbamoyl-piperazine-1-carboxylic acid tert-butyl ester196811-66-256 % similar