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tert-Butyl piperazine-1-carboxylate57260-71-639 % similar tert-Butyl 4-oxopiperidine-1-carboxylate79099-07-339 % similar 1-(tert-Butoxycarbonyl)-4-(p-toluenesulfonyloxy)piperidine118811-07-739 % similar 2-(1,1-Dimethylethyl) 1-(phenylmethyl) (2S)-1,2-pyrrolidinedicarboxylate16881-39-339 % similar 4-[(tert-Butoxy)carbonyl]piperazine-2-carboxylic acid128019-59-039 % similar Ethyl 1-[(1,1-dimethylethoxy)carbonyl]-4-piperidineacetate135716-09-539 % similar (S)-4-N-Boc-piperazine-2-carboxylic acid848482-93-939 % similar tert-Butyl 3-cyano-4-oxopiperidine-1-carboxylate914988-10-639 % similar 1,1-Dimethylethyl 3-(1-hydroxy-1-methylethyl)-1-azetidinecarboxylate1257293-79-038 % similar 1-Boc-3-cyanoazetidine142253-54-138 % similar 1-Boc-Azetidine-3-carboxylic acid142253-55-238 % similar 4-(2-Amino-ethyl)-piperazine-1-carboxylic acid tert-butyl ester192130-34-038 % similar 4-Thiocarbamoyl-piperazine-1-carboxylic acid tert-butyl ester196811-66-238 % similar 3-Ethynyl-1-azetidinecarboxylic acid tert-butyl ester287193-01-538 % similar tert-Butyl (4-aminophenyl)carbamate71026-66-938 % similar 1,1-Dimethylethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-piperidinecarboxylate1048970-17-738 % similar 1,1-Dimethylethyl 2-cyano-1-pyrrolidinecarboxylate144688-70-038 % similar 1-(1,1-Dimethylethyl) 2-borono-1-pyrrolidinecarboxylate149682-75-738 % similar Boc-L-proline15761-39-438 % similar [1-(tert-Butoxycarbonyl)piperidin-4-yl]acetic acid157688-46-538 % similar