5-(Difluoromethyl)-4-fluoro-2-hydroxypyridine-3-carboxaldehyde
4-(Bromomethyl)-3-(difluoromethyl)-2-fluoro-6-hydroxypyridine
4-(Bromomethyl)-2-(difluoromethyl)-3-fluoro-6-hydroxypyridine
3-(Difluoromethyl)-6-fluoro-2-hydroxypyridine-5-carboxylic acid