Ethyl 3-(chloromethyl)-4-(difluoromethyl)-2-hydroxypyridine-5-carboxylate
Ethyl 4-(bromomethyl)-2-(difluoromethyl)-5-hydroxypyridine-3-acetate
Ethyl 3-(bromomethyl)-4-(difluoromethyl)-5-hydroxypyridine-2-acetate
Methyl 2-(difluoromethyl)-3-iodo-5-methylpyridine-6-carboxylate