tert-Butyl 2-methyl-4-oxopiperidine-1-carboxylate190906-92-4100 % similar tert-Butyl 2-methylpiperazine-1-carboxylate120737-78-257 % similar 1,1-Dimethylethyl (2S)-2-methyl-1-piperazinecarboxylate169447-70-557 % similar tert-Butyl 4-oxopiperidine-1-carboxylate79099-07-355 % similar 1,2-Bis(1,1-dimethylethyl) (2S)-4-oxo-1,2-pyrrolidinedicarboxylate166410-05-551 % similar 1-(1,1-Dimethylethyl) (2S)-4-oxo-1,2-pyrrolidinedicarboxylate84348-37-849 % similar 1,1-Dimethylethyl N-methyl-N-(4-oxocyclohexyl)carbamate400899-84-549 % similar 1-tert-Butyl 2-methyl (2S)-4-oxopyrrolidine-1,2-dicarboxylate102195-80-248 % similar tert-Butyl 3-oxoazetidine-1-carboxylate398489-26-446 % similar N-Boc-cis-2,6-diethyl-4-piperidone1003843-30-845 % similar 1,1-Dimethylethyl 9-oxo-3-azaspiro[5.5]undecane-3-carboxylate873924-08-445 % similar 1,1-Dimethylethyl 2-oxo-1-pyrrolidinecarboxylate85909-08-645 % similar 1,1-Dimethylethyl (2R,5R)-5-(hydroxymethyl)-2-methyl-1-piperazinecarboxylate1403898-64-545 % similar 1-[(1,1-Dimethylethoxy)carbonyl]-2-piperidinepropanoic acid669713-96-645 % similar 1,1-Dimethylethyl (2S)-2-formyl-1-pyrrolidinecarboxylate69610-41-944 % similar (2S)-1-[(1,1-Dimethylethoxy)carbonyl]-2-pyrrolidineacetic acid56502-01-344 % similar 1,1-Dimethylethyl 1-pyrrolidinecarboxylate86953-79-944 % similar (S)-1-N-Boc-2-(aminomethyl)pyrrolidine119020-01-843 % similar tert-Butyl 2-(hydroxymethyl)pyrrolidine-1-carboxylate170491-63-143 % similar 1,1-Dimethylethyl 5-oxo-2-azabicyclo[2.2.1]heptane-2-carboxylate198835-06-243 % similar