2,2'-Bibenzimidazole,5,5',6,6'-tetramethyl- (8CI); 5,5',6,6'-Tetramethyl-2,2'-bi(1H)-benzimidazole;5,5',6,6'-Tetramethyl-2,2'-bibenzimidazole;5,6,5',6'-Tetramethyl-2,2'-dibenzimidazole; NSC 163940
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