2-(Bromomethyl)-6-cyano-3-(difluoromethyl)-4-hydroxypyridine
5-(Difluoromethyl)-2-fluoro-3-hydroxypyridine-6-carbonyl chloride
4-(Difluoromethyl)-3-fluoro-6-hydroxypyridine-2-carbonyl chloride
4-(Difluoromethyl)-2-hydroxy-3-iodopyridine-6-acetic acid