(2S,4R)-1-(tert-butoxycarbonyl)-4-(cyclopropylmethyl)pyrrolidine-2-carboxylic acid

(2S,4R)-1-tert-butyl 2-methyl 4-(cyclopropylmethyl)pyrrolidine-1,2-dicarboxylate

(2S,4R,5S)-5-(dimethoxyphosphoryl)-4-(2-hydroxyethyl)pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester

(2S,4R,5R)-5-(dimethoxyphosphoryl)-4-(2-hydroxyethyl)pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester

(2S,4R,5S)-5-(dimethoxyphosphoryl)-4-[2-(1,3-dioxo-1H,3H-benzo[de]isoquinolin-2-yl)ethyl]pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester