2-{3-Methyl-2-[3-methyl-2-(5-1H-tetrazol-5-yl-pentanoylamino)-butyrylamino]-butyryl}-octahydro-cyclopenta[c]pyrrole-1-carboxylic acid [2-amino-1-(1-phenyl-ethylaminooxalyl)-butyl]-amide AIDS-212566 AIDS212566