1-[[2-(2-{2-[(2-Benzyl-4-phenyl-butyryl)-methyl-amino]-3-methyl-butyrylamino}-3,3-dimethyl-butyrylamino)-4-oxo-4-pyrrolidin-1-yl-butyrylamino]-(1-hydroxymethyl-3,3-dimethyl-butylcarbamoyl)-methyl]-cyclopentanecarboxylic acid AIDS-191724 AIDS191724 BULD 1263