Ethyl 3-(difluoromethyl)-4-methoxy-5-methylpyridine-2-carboxylate
Ethyl 2-bromo-6-(difluoromethyl)-5-nitropyridine-3-acetate
Ethyl 2-bromo-6-(difluoromethyl)-3-(trifluoromethyl)pyridine-4-acetate
Ethyl 2-bromo-3-(difluoromethyl)-5-(trifluoromethyl)pyridine-6-acetate