1,3-Dimethylbenzimidazol-2(3H)-one 1,3-Dimethylbenzimidazolinone 2-Benzimidazolinone, 1,3-dimethyl- 2H-Benzimidazol-2-one, 1,3-dihydro-1,3-dimethyl- 3097-21-0 N,N'-Dimethyl-2-benzimidazolone N,N'-Dimethylbenzimidazole NSC27983