(2S,4r)-1-boc-4-(叔丁基二甲基甲硅烷基氧基)-2-(羟基甲基)吡咯烷

(2S,4R)-Cbz-4-甲磺酰氧基脯氨酸甲酯

(4R)-4-(氰基甲基)-L-脯氨酸

(2S,4S)-1-tert-Butyl 2-methyl 4-(benzoyloxy)pyrrolidine-1,2-dicarboxylate

5-O-tert-butyl 6-O-methyl (6S)-5-azaspiro[2.4]heptane-5,6-dicarboxylate