2,2'-Methylenebis[5-((4-ethyl)-2-imidazolin-2-yl)-1H-benzimidazole] 5-(4-ethyl-4,5-dihydro-1H-imidazol-2-yl)-2-{[5-(5-ethyl-4,5-dihydro-1H-imidazol-2-yl)-1H-benzimidazol-2-yl]methyl}-1H-benzimidazole AIDS-195633 AIDS195633