12-(4-Aminobutyl)-9-benzyl-15-(hydroxymethyl)-18-(1H-imidazol-4-ylmethyl)-3,6-bis(1H-indol-3-ylmethyl)-1,4,7,10,13,16,19-heptaazacyclohenicosane-2,5,8,11,14,17,20-heptone AIDS-150913 AIDS150913 NSC689423