Ethyl 4-(difluoromethyl)-2-methoxypyridine-5-carboxylate
Ethyl 4-(chloromethyl)-2-(difluoromethyl)-6-(trifluoromethoxy)pyridine-3-acetate
Ethyl 3-(difluoromethyl)-5-methoxypyridine-4-carboxylate
Ethyl 3-(chloromethyl)-5-(difluoromethyl)-6-(trifluoromethoxy)pyridine-2-acetate