1-[[2-(3,3-Dimethyl-2-{3-methyl-2-[methyl-(3-phenyl-propionyl)-amino]-butyrylamino}-butyrylamino)-4-oxo-4-pyrrolidin-1-yl-butyrylamino]-(1-hydroxymethyl-3,3-dimethyl-butylcarbamoyl)-methyl]-cyclopentanecarboxylic acid AIDS-188197 AIDS188197