1,1',3,3',5,5',6,6'-octamethyl-1,1',3,3'-tetrahydro-2,2'-spirobi[benzimidazole]

1,1',3,3',5,5',6,6'-octamethyl-1,1',3,3'-tetrahydro-2,2'-spirobi[benzimidazole] · CAS 99643-38-6

1,1',3,3',5,5',6,6'-octamethyl-1,1',3,3'-tetrahydro-2,2'-spirobi[benzimidazole]