1,3,4-Oxadiazol-2(3H)-one, 5-(1-methyl-1H-benzimidazol-2-yl)- 1-Methyl-2-(1,3,4-oxadiazol-2(3H)-one-5-yl)benzimidazole 78620-28-7 Rhc 3288 Rhc-3288