1,3-Dime-bit 1,3-Dimethylbenzimidazoline-2-thione 2H-Benzimidazole-2-thione, 1,3-dihydro-1,3-dimethyl- 2H-Benzimidazole-2-thione,1,3-dihydro-1,3-dimethyl- 3418-46-0