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tert-Butyl 2-methyl-4-oxopiperidine-1-carboxylate190906-92-4100 % similar 1-Piperidinecarboxylicacid,2-methyl-4-oxo-,1,1-dimethylethylester,(2R)-(9ci)790667-43-5100 % similar 1-tert-Butyl 2-methyl 4-oxopiperidine-1,2-dicarboxylate81357-18-861 % similar 1-Boc-2-phenyl-piperidin-4-one849928-30-959 % similar tert-Butyl 2-methylpiperazine-1-carboxylate120737-78-257 % similar 1,1-Dimethylethyl (2S)-2-methyl-1-piperazinecarboxylate169447-70-557 % similar (R)-1-N-Boc-2-methylpiperazine170033-47-357 % similar 1-Boc-2-benzyl-piperidin-4-one193480-28-356 % similar tert-Butyl 4-oxopiperidine-1-carboxylate79099-07-355 % similar N-Boc-hexahydro-1H-azepin-4-one188975-88-454 % similar 3-Oxopyrrolidine-1-carboxylic acid tert-butyl ester101385-93-753 % similar 1,2-Bis(1,1-dimethylethyl) (2S)-4-oxo-1,2-pyrrolidinedicarboxylate166410-05-551 % similar tert-Butyl (2R,5S)-2,5-dimethylpiperazine-1-carboxylate309915-46-649 % similar (2S,5R)-2,5-Dimethyl-piperazine-1-carboxylic acid tert-butyl ester548762-66-949 % similar 1-(1,1-Dimethylethyl) (2S)-4-oxo-1,2-pyrrolidinedicarboxylate84348-37-849 % similar 1-(tert-Butoxycarbonyl)-4-oxopyrrolidine-2-carboxylic acid876317-19-049 % similar tert-Butyl 2,2-dimethyl-4-oxopiperidine-1-carboxylate346593-03-149 % similar 1,1-Dimethylethyl N-methyl-N-(4-oxocyclohexyl)carbamate400899-84-549 % similar tert-Butyl 2,4-dioxopiperidine-1-carboxylate845267-78-949 % similar 1-tert-Butyl 2-methyl (2S)-4-oxopyrrolidine-1,2-dicarboxylate102195-80-248 % similar