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4-Thiocarbamoyl-piperazine-1-carboxylic acid tert-butyl ester196811-66-242 % similar tert-Butyl 4-(2-hydroxyethyl)piperazine-1-carboxylate77279-24-442 % similar tert-Butyl 2,7-diazaspiro[3.5]nonane-7-carboxylate896464-16-742 % similar 1-Boc-4-methylenepiperidine159635-49-142 % similar 3-Oxo-azetidine-1-carboxylic acid tert-butyl ester398489-26-441 % similar 1-Boc-4-methylaminopiperidine147539-41-141 % similar tert-Butyl 4-(chloromethyl)piperidine-1-carboxylate479057-79-941 % similar 1-N-Boc-4-(phenylamino)piperidine125541-22-241 % similar 4-P-Aminophenyl-1-boc-piperidine170011-57-141 % similar 3-Oxopyrrolidine-1-carboxylic acid tert-butyl ester101385-93-741 % similar tert-Butyl 4,4-difluoropiperidine-1-carboxylate281652-10-641 % similar 4-[(1,1-Dimethylethoxy)carbonyl]-α-phenyl-1-piperazineacetic acid347186-49-641 % similar 4-Boc-1-piperazineacetic acid156478-71-640 % similar tert-Butyl 4-hydroxypiperidine-1-carboxylate109384-19-240 % similar tert-Butyl 1-oxa-6-azaspiro(2.5)octane-6-carboxylate147804-30-640 % similar tert-Butyl 4-bromopiperidine-1-carboxylate180695-79-840 % similar 1,1-Dimethylethyl 3,8-diazabicyclo[3.2.1]octane-3-carboxylate201162-53-040 % similar N-Boc-5-bromoisoindoline201940-08-140 % similar 7-Boc-2-oxa-7-azaspiro[3.5]nonane240401-27-840 % similar tert-Butyl 4-iodopiperidine-1-carboxylate301673-14-340 % similar