Ethyl 2-(difluoromethyl)-3-fluoro-5-hydroxypyridine-6-carboxylate
2-(Bromomethyl)-6-(difluoromethyl)-3-fluoro-5-iodopyridine
Methyl 5-(difluoromethyl)-3-fluoro-4-hydroxypyridine-2-carboxylate
2-(Bromomethyl)-3-(difluoromethyl)-4-fluoro-6-iodopyridine