14-(((1-(2-((2-((((2-Amino-4-carboxybutanoyl)amino)acetyl)amino)propanoyl)amino)-4-methylpentanoyl)-2-pyrrolidinyl)carbonyl)amino)-8-(4-hydroxybenzyl)-11-(hydroxymethyl)-5-isobutyl-4,7,10,13-tetraoxo-\t3,6,9,12-tetraazaheptadecane-1,17-dioic acid AIDS-134006 AIDS134006 NSC631171