17-(4-Aminobutyl)-20-((2-amino-4-methylpentanoyl)amino)-8-(4-hydroxybenzyl)-2-(1-hydroxyethyl)-5,11-bis(hydroxymethyl)-14-methyl-4,7,10,13,16,19-hexaoxo-3,6,9,12,15,18-hexaazadocosane-1,22-dioic acid AIDS-135332 AIDS135332 NSC634819