tert-butyl (2S,4S)-2-{[(2S)-2-cyano-1-pyrrolidinyl]carbonyl}-4-isobutyl-1-pyrrolidinecarboxylate

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

(2S,3aS,7aR)-7a-Allyl-octahydro-indole-1,2-dicarboxylic acid 1-benzyl ester 2-methyl ester

(2S,4S)-4-((E)-4-Benzo[1,3]dioxol-5-yl-but-3-enyl)-5-oxo-pyrrolidine-2-carboxylic acid methyl ester