1-tert-Butyl 2-methyl (2S)-4-oxopyrrolidine-1,2-dicarboxylate102195-80-2100 % similar 1,2-Bis(1,1-dimethylethyl) (2S)-4-oxo-1,2-pyrrolidinedicarboxylate166410-05-581 % similar 1-(1,1-Dimethylethyl) (2S)-4-oxo-1,2-pyrrolidinedicarboxylate84348-37-864 % similar N-Boc-cis-4-hydroxy-L-proline methyl ester102195-79-959 % similar (2R,4R)-4-Hydroxy-pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester114676-69-659 % similar 1-tert-Butyl 2-methyl (2S,4R)-4-aminopyrrolidine-1,2-dicarboxylate121148-00-359 % similar 1-(1,1-Dimethylethyl) 2-methyl 1,2-piperazinedicarboxylate129799-15-159 % similar 1-(1,1-Dimethylethyl) 2-methyl (2S,4S)-4-fluoro-1,2-pyrrolidinedicarboxylate203866-16-459 % similar 1-(1,1-Dimethylethyl) 2-methyl (2S)-4,4-difluoro-1,2-pyrrolidinedicarboxylate203866-17-559 % similar 1-(1,1-Dimethylethyl) 2-methyl (2S,4R)-4-fluoro-1,2-pyrrolidinedicarboxylate203866-18-659 % similar (2S,4R)-4-Hydroxypyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester74844-91-059 % similar N-Boc-3,4-dehydro-L-proline methyl ester74844-93-258 % similar 1-tert-Butyl 2-methyl (2S,4R)-4-aminopyrrolidine-1,2-dicarboxylate hydrochloride334999-32-555 % similar 1-(1,1-Dimethylethyl) 2-methyl (2S,4S)-4-cyano-1,2-pyrrolidinedicarboxylate487048-28-255 % similar 3-tert-Butyl 4-methyl (4S)-2,2-dimethyl-1,3-oxazolidine-3,4-dicarboxylate108149-60-654 % similar 1-(1,1-Dimethylethyl) 2-methyl (2S)-5-oxo-1,2-pyrrolidinedicarboxylate108963-96-854 % similar (R)-Methyl-3-(tert-butoxycarbonyl)-2,2-dimethyl-4-oxazolidinecarboxylate95715-86-954 % similar 1-tert-Butyl 3-methyl azetidine-1,3-dicarboxylate610791-05-453 % similar 1-(1,1-Dimethylethyl) 4-methyl 1,4-piperidinedicarboxylate124443-68-151 % similar 1-tert-Butyl 3-methyl pyrrolidine-1,3-dicarboxylate122684-33-749 % similar