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2,8-Diaza-spiro[4.5]decane-8-carboxylic acid tert-butyl ester236406-39-649 % similar 3-(4-(tert-Butoxycarbonyl)piperazin-1-yl)propanoic acid242459-97-849 % similar tert-Butyl 2-oxo-1,7-diazaspiro(3.5)nonane-7-carboxylate392331-78-149 % similar 4-(2-Amino-ethyl)-piperazine-1-carboxylic acid tert-butyl ester192130-34-049 % similar 4-Thiocarbamoyl-piperazine-1-carboxylic acid tert-butyl ester196811-66-249 % similar tert-Butyl 4-(2-hydroxyethyl)piperazine-1-carboxylate77279-24-449 % similar 1-Boc-4-methylenepiperidine159635-49-149 % similar N-(tert-Butoxycarbonyl)iminodiacetic Acid56074-20-549 % similar 1-Aminocyclopropane-1-carboxylic acid22059-21-849 % similar 4-Benzyloxycarbonylamino-piperidine-1,4-dicarboxylic acid mono-tert-butyl ester288154-16-548 % similar 1-(1,1-Dimethylethyl) 4-methyl 4-(aminomethyl)-1,4-piperidinedicarboxylate362703-35-348 % similar 1-Boc-piperazine acetate143238-38-448 % similar [1-(tert-Butoxycarbonyl)piperidin-4-yl]acetic acid157688-46-548 % similar 1-Boc-4-spiro-[3-(2-pyrrolidinone)] piperidine268550-48-748 % similar 3-Oxo-1-oxa-8-aza-spiro[4.5]decane-8-carboxylic acid tert-butyl ester954236-44-348 % similar N-Boc-4-piperidinemethanol123855-51-648 % similar 1-Boc-4-(aminomethyl)piperidine144222-22-048 % similar 1-(tert-Butoxycarbonyl)-4-(2-hydroxyethyl)piperidine89151-44-048 % similar tert-Butyl 2,9-diazaspiro(5.5)undecane-9-carboxylate1023595-19-847 % similar 3-(1-((tert-Butoxy)carbonyl)piperidin-4-yl)propanoic acid154775-43-647 % similar