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tert-Butyl 4-(3-ethoxy-3-oxopropanoyl)piperidine-1-carboxylate479630-08-542 % similar tert-Butyl 4-(2-ethoxy-2-oxoethylidene)piperidine-1-carboxylate135716-08-442 % similar 1,1-Dimethylethyl 2-oxo-1-pyrrolidinecarboxylate85909-08-640 % similar 3-Ethoxycarbonylmethylene-azetidine-1-carboxylic acid tert-butyl ester1002355-96-540 % similar Ethyl N-boc-4-methylpiperidine-4-carboxylate189442-87-340 % similar Boc-L-pro-ome59936-29-740 % similar Boc-D-pro-ome73323-65-640 % similar 1,2-Bis(1,1-dimethylethyl) (2S)-4-oxo-1,2-pyrrolidinedicarboxylate166410-05-540 % similar 1-tert-Butyl 2-methyl piperidine-1,2-dicarboxylate167423-93-040 % similar tert-Butyl 2-oxopiperidine-1-carboxylate85908-96-940 % similar Ethyl cyclobutanecarboxylate14924-53-940 % similar 1-(1,1-Dimethylethyl) 4-methyl 1,4-piperidinedicarboxylate124443-68-139 % similar tert-Butyl 6-Oxa-3-azabicyclo(3.1.0)hexane-3-carboxylate114214-49-239 % similar 2-((tert-Butoxycarbonyl)amino)-3-ethoxy-3-oxopropanoic acid137401-45-739 % similar Ethyl 1-methylpiperidine-2-carboxylate30727-18-539 % similar 1,1-Dimethylethyl (3R,4S)-3-(1-ethoxyethoxy)-2-oxo-4-phenyl-1-azetidinecarboxylate201856-57-739 % similar Ethyl cyclohexanecarboxylate3289-28-939 % similar 1,3-Diethyl 2-(1,1-dimethylethyl)propanedioate759-24-039 % similar 1-(1,1-Dimethylethyl) 2-borono-1-pyrrolidinecarboxylate149682-75-738 % similar 1-Boc-3-(amino)azetidine193269-78-238 % similar