4-Bromo-5-hydroxy-3-methoxy-2-(trifluoromethoxy)pyridine
3-(Chloromethyl)-4-(difluoromethyl)-5-methyl-2-(trifluoromethyl)pyridine
2-Cyano-3-(difluoromethyl)-4-hydroxypyridine-5-sulfonyl chloride
2-Methoxy-6-(trifluoromethoxy)pyridine-4-sulfonyl chloride