Ethyl 4-(difluoromethyl)-6-hydroxy-3-methylpyridine-2-acetate
4-(Difluoromethyl)-5-hydroxy-2-iodopyridine-3-sulfonyl chloride
Ethyl 3-(difluoromethyl)-4-hydroxy-2-methylpyridine-5-acetate
2-(Difluoromethyl)-6-hydroxy-3-methylpyridine-4-sulfonyl chloride