3-Cyano-6-(difluoromethyl)-2-hydroxypyridine-4-carbonyl chloride
4-Cyano-5-(difluoromethyl)-2-hydroxypyridine-3-carbonyl chloride
2-Chloro-4-(chloromethyl)-6-(difluoromethyl)pyridine-3-methanol
2-Chloro-4-(chloromethyl)-3-(difluoromethyl)pyridine-6-methanol