4-[(tert-Butoxy)carbonyl]piperazine-2-carboxylic acid128019-59-0100 % similar 1-tert-Butyl 3-methyl piperazine-1,3-dicarboxylate129799-08-267 % similar 1-(1,1-Dimethylethyl) 3-methyl (3S)-1,3-piperazinedicarboxylate314741-39-467 % similar 1-(1,1-Dimethylethyl) 3-methyl (3R)-1,3-piperazinedicarboxylate438631-77-767 % similar tert-Butyl 3-methylpiperazine-1-carboxylate120737-59-963 % similar 1,1-Dimethylethyl (3S)-3-(hydroxymethyl)-1-piperazinecarboxylate314741-40-762 % similar 1-(1,1-Dimethylethyl) (3R)-1,3-pyrrolidinedicarboxylate72925-16-761 % similar 1-(1,1-Dimethylethyl) (3R)-1,3-piperidinedicarboxylate163438-09-360 % similar 1-Boc-azetidine-3-carboxylic acid142253-55-260 % similar 3-(1,1-Dimethylethyl) (1α,5α,6α)-3-azabicyclo[3.1.0]hexane-3,6-dicarboxylate927679-54-757 % similar Methyl 4-[(1,1-dimethylethoxy)carbonyl]-2-piperazineacetate183742-33-854 % similar N-Boc-piperazine57260-71-654 % similar 7-(1,1-Dimethylethyl) 7-azaspiro[3.5]nonane-2,7-dicarboxylate873924-12-052 % similar (S)-3-Hydroxypyrrolidine-1-carboxylic acid tert-butyl ester101469-92-551 % similar 3-Hydroxypyrrolidine-1-carboxylic acid tert-butyl ester103057-44-951 % similar tert-Butyl (3R)-3-hydroxypyrrolidine-1-carboxylate109431-87-051 % similar 1-Boc-2-piperazinecarboxylic acid1214196-85-651 % similar (3S)-1-[(1,1-Dimethylethoxy)carbonyl]-3-pyrrolidineacetic acid204688-61-949 % similar tert-Butyl 3-(hydroxymethyl)pyrrolidine-1-carboxylate114214-69-649 % similar 1,1-Dimethylethyl (3S)-3-(methylamino)-1-pyrrolidinecarboxylate147081-59-249 % similar