1-[(1-Carboxy-3-methyl-butylcarbamoyl)-(2-{3-methyl-2-[3-methyl-2-(3-phenyl-propionylamino)-butyrylamino]-butyrylamino}-4-oxo-4-pyrrolidin-1-yl-butyrylamino)-methyl]-cyclopentanecarboxylic acid AIDS-188206 AIDS188206