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

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