2-(3-Methyl-2-{3-methyl-2-[(pyrazine-2-carbonyl)-amino]-butyrylamino}-butyryl)-1,2,3,3a,6,6a-hexahydro-cyclopenta[c]pyrrole-1-carboxylic acid [1-(1-phenyl-ethylaminooxalyl)-propyl]-amide AIDS-211011 AIDS211011