Pharma Intermediates, 1H-Benzimidazole, Mercaptobenzimidazole Derivatives, 2-Mercaptobenzimidazole, (4,5) Methyl-2-Mercaptobenzimidazole, 5-Difluoromethoxy-2-Mercaptobenzimidazole, 5-Methoxy-2-Mercaptobenzimidazole , 5-Nitro-2-Mercaptobenzimidazole, 5-Amino-2-Mercaptobenzimidazole, 5-Methyl-2-Mercaptobenzimidazole, Zinc Salt Of 2-Mercaptobenzimidazole