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1-(1,1-Dimethylethyl) 3-methyl (3S)-1,3-piperazinedicarboxylate314741-39-443 % similar 1-(1,1-Dimethylethyl) 3-methyl (3R)-1,3-piperazinedicarboxylate438631-77-743 % similar 1-(1,1-Dimethylethyl) 2-methyl (2S,4R)-4-[[(4-methylphenyl)sulfonyl]oxy]-1,2-pyrrolidinedicarboxylate88043-21-442 % similar tert-Butyl 6-amino-2-azaspiro[3.3]heptane-2-carboxylate1211586-09-241 % similar 1,1-Dimethylethyl (2R)-2-(((2,5-dioxo-1-pyrrolidinyl)oxy)carbonyl)-1-pyrrolidinecarboxylate102185-34-240 % similar 1-[(tert-Butoxy)carbonyl]azetidine-2-carboxylic acid159749-28-740 % similar Boc-D-azetidine-2-carboxylic acid228857-58-740 % similar 1-O-tert-Butyl 2-O-(2,5-dioxopyrrolidin-1-yl) (2S)-pyrrolidine-1,2-dicarboxylate3392-10-740 % similar 1-Boc-L-azetidine-2-carboxylic acid51077-14-640 % similar Boc-val-ome58561-04-940 % similar 1,1-Dimethylethyl (2S)-2-formyl-1-pyrrolidinecarboxylate69610-41-940 % similar N-(tert-Butoxycarbonyl)-D-prolinal73365-02-340 % similar 1,1-Dimethylethyl 5-oxo-2-azabicyclo[2.2.1]heptane-2-carboxylate198835-06-239 % similar tert-Butyl 3-((methoxycarbonyl)methyl) azetidine-1-carboxylate497160-14-239 % similar Di-tert-butyl (2S)-5-oxopyrrolidine-1,2-dicarboxylate91229-91-339 % similar (2S,4S)-1-((tert-Butoxy)carbonyl)-4-fluoropyrrolidine-2-carboxylic acid203866-13-139 % similar (2S,4R)-1-[(tert-Butoxy)carbonyl]-4-fluoropyrrolidine-2-carboxylic acid203866-14-239 % similar (2R,4S)-1-(tert-Butoxycarbonyl)-4-fluoropyrrolidine-2-carboxylic acid681128-50-739 % similar (2R,4R)-1-[(tert-Butoxy)carbonyl]-4-fluoropyrrolidine-2-carboxylic acid681128-51-839 % similar 1,1-Dimethylethyl 3,3-difluoro-4-hydroxy-1-pyrrolidinecarboxylate1434141-81-738 % similar