Ethyl 3-(chloromethyl)-6-(difluoromethyl)-2-methoxypyridine-5-carboxylate
4-(Difluoromethyl)-5-methyl-3-nitropyridine-2-sulfonamide
Ethyl 3-(difluoromethyl)-6-methoxy-4-nitropyridine-2-acetate
4-(Difluoromethyl)-3-methyl-2-nitropyridine-6-sulfonamide