2-Cyano-3-(difluoromethyl)-4-methylpyridine-6-sulfonyl chloride
3-Cyano-5-(difluoromethyl)-2-hydroxy-6-(trifluoromethyl)pyridine
2-Cyano-5-(difluoromethyl)-3-hydroxy-6-(trifluoromethyl)pyridine
6-Cyano-4-(difluoromethyl)-3-methoxy-2-(trifluoromethyl)pyridine