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tert-Butyl piperazine-1-carboxylate57260-71-640 % similar tert-Butyl 4-oxopiperidine-1-carboxylate79099-07-340 % similar 4-(2-Amino-ethyl)-piperazine-1-carboxylic acid tert-butyl ester192130-34-039 % similar tert-Butyl 4-(6-aminopyridin-3-yl)piperazine-1-carboxylate571188-59-539 % similar 1-Boc-4-methylenepiperidine159635-49-139 % similar tert-Butyl 3-iodoazetidine-1-carboxylate254454-54-139 % similar 3-Amino-2,6-dihydro-pyrrolo(3,4-c)pyrazole-5(4H)-carboxylic acid 1,1-dimethylethyl ester398491-59-339 % similar 1-(tert-Butoxycarbonyl)-3,3-dimethyl-4-oxopiperidine324769-06-438 % similar 3-Oxo-azetidine-1-carboxylic acid tert-butyl ester398489-26-438 % similar N-(tert-Butoxycarbonyl)-2,5-dihydro-1H-pyrrole73286-70-138 % similar tert-Butyl 4-benzylpiperazine-1-carboxylate57260-70-538 % similar 3-Oxopyrrolidine-1-carboxylic acid tert-butyl ester101385-93-738 % similar tert-Butyl 4,4-difluoropiperidine-1-carboxylate281652-10-638 % similar 4-(2-Aminoethyl)-1-boc-piperidine146093-46-138 % similar tert-Butyl 4-hydroxypiperidine-1-carboxylate109384-19-237 % similar tert-Butyl 1-oxa-6-azaspiro(2.5)octane-6-carboxylate147804-30-637 % similar 4-Chloro-piperidine-1-carboxylic acid tert-butyl ester154874-94-937 % similar tert-Butyl 4-bromopiperidine-1-carboxylate180695-79-837 % similar 7-Boc-2-oxa-7-azaspiro[3.5]nonane240401-27-837 % similar tert-Butyl 4-iodopiperidine-1-carboxylate301673-14-337 % similar