2,2'-Methylenebis[5-(1,4,5,6-tetrahydro-5,5-dimethyl-2-pyrimidinyl)-1H-benzimidazole] 5-(5,5-dimethyl-1,4,5,6-tetrahydropyrimidin-2-yl)-2-{[6-(5,5-dimethyl-1,4,5,6-tetrahydropyrimidin-2-yl)-1H-benzimidazol-2-yl]methyl}-1H-benzimidazole AIDS-195636 AIDS195636