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Di-tert-butyl (2S)-5-oxopyrrolidine-1,2-dicarboxylate91229-91-3100 % similar 1-(1,1-Dimethylethyl) 2-methyl (2S)-5-oxo-1,2-pyrrolidinedicarboxylate108963-96-882 % similar 1-(1,1-Dimethylethyl) 2-ethyl (2S)-5-oxo-1,2-pyrrolidinedicarboxylate144978-12-178 % similar 1-Boc-D-pyroglutamic acid ethyl ester144978-35-878 % similar (R)-Boc-5-oxopyrrolidine-2-carboxylic acid160347-90-070 % similar 1-(1,1-Dimethylethyl) (2S)-5-oxo-1,2-pyrrolidinedicarboxylate53100-44-070 % similar 1-(1,1-Dimethylethyl) 2-(phenylmethyl) (2S)-5-oxo-1,2-pyrrolidinedicarboxylate113400-36-566 % similar Boc-L-pyroglutaminol81658-25-560 % similar 1,2-Bis(1,1-dimethylethyl) (2S)-4-oxo-1,2-pyrrolidinedicarboxylate166410-05-551 % similar 1,1-Dimethylethyl (2R)-2-(((2,5-dioxo-1-pyrrolidinyl)oxy)carbonyl)-1-pyrrolidinecarboxylate102185-34-250 % similar 1-O-tert-Butyl 2-O-(2,5-dioxopyrrolidin-1-yl) (2S)-pyrrolidine-1,2-dicarboxylate3392-10-750 % similar Azetidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester255882-72-547 % similar 1,1-Dimethylethyl 2-oxo-1-pyrrolidinecarboxylate85909-08-645 % similar Boc-L-pro-ome59936-29-745 % similar Boc-D-pro-ome73323-65-645 % similar tert-Butyl 2-oxopiperidine-1-carboxylate85908-96-944 % similar tert-Butyl 6-Oxa-3-azabicyclo(3.1.0)hexane-3-carboxylate114214-49-244 % similar tert-Butyl 4-oxopiperidine-1-carboxylate79099-07-344 % similar 1-tert-Butyl 2-methyl piperidine-1,2-dicarboxylate167423-93-044 % similar 1-(1,1-Dimethylethyl) 4-methyl 1,4-piperidinedicarboxylate124443-68-143 % similar