1 997 1-[3,3-dimethyl-2-(2-methylamino-propionylamino)-butyryl]-4-phenoxy-pyrrolidine-2-carboxylic acid(1,2,3,4-tetrahydro-naphthalen-1-yl)-amide 1.000 2 998 N-methylalanyl-3-methylvalyl-N-(1,2,3,4-tetrahydronaphthalen-1-yl)prolinamide 0.821