(2S,3R)-methyl 1-benzoyl-3-(2-(tert-butoxy)-2-oxoethyl)-4-((methoxycarbonyl)oxy)-4-(prop-1-en-2-yl)pyrrolidine-2-carboxylate

(2S,3R)-methyl 4-acetoxy-1-benzoyl-3-(2-(tert-butoxy)-2-oxoethyl)-4-(prop-1-en-2-yl)pyrrolidine-2-carboxylate

Boc-D-焦谷氨酸乙酯

(2S)-1-tert-butyl 2-ethyl 4-(2-hydroxypropan-2-yl)-5-oxopyrrolidine-1,2-dicarboxylate

(2S,4R)-4-[1-(tert-Butyl-dimethyl-silanyloxy)-1-methyl-ethyl]-pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-ethyl ester