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

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

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

5-(4-Ethyl-phenyl)-thiophene-2-carboxylic acid [(S)-1-((R)-3-amino-pyrrolidine-1-carbonyl)-pyrrolidin-3-yl]-methyl-amide

5-Bromo-thiophene-2-carboxylic acid methyl-{(S)-1-[(R)-3-(2,2,2-trifluoro-acetylamino)-pyrrolidine-1-carbonyl]-pyrrolidin-3-yl}-amide