4'-Trifluoromethyl-biphenyl-4-carboxylic acid [(S)-1-((R)-3-amino-pyrrolidine-1-carbonyl)-pyrrolidin-3-yl]-methyl-amide

(S)-3-(tert-Butoxycarbonyl-methyl-amino)-pyrrolidine-1-carboxylic acid 4-nitro-phenyl ester

Methyl-{(S)-1-[(R)-3-(2,2,2-trifluoro-acetylamino)-pyrrolidine-1-carbonyl]-pyrrolidin-3-yl}-carbamic acid tert-butyl ester

2,2,2-Trifluoro-N-[(R)-1-((S)-3-methylamino-pyrrolidine-1-carbonyl)-pyrrolidin-3-yl]-acetamide

((R)-1-{(S)-3-[Methyl-(4'-trifluoromethyl-biphenyl-4-carbonyl)-amino]-pyrrolidine-1-carbonyl}-pyrrolidin-3-yl)-carbamic acid tert-butyl ester

4'-Trifluoromethyl-biphenyl-4-carboxylic acid methyl-(S)-pyrrolidin-3-yl-amide