1-[[2-(2-{2-[(2-Benzyl-3-phenyl-propionyl)-methyl-amino]-3-methyl-butyrylamino}-3,3-dimethyl-butyrylamino)-4-oxo-4-pyrrolidin-1-yl-butyrylamino]-(1-hydroxymethyl-3-methyl-butylcarbamoyl)-methyl]-cyclopentanecarboxylic acid AIDS-188198 AIDS188198