3-(Bromomethyl)-2-(difluoromethyl)-6-(trifluoromethoxy)pyridine-4-carbonyl chloride
3-Chloro-2-(methoxycarbonyl)-4-nitropyridine 1-oxide
3-Cyano-2-(trifluoromethoxy)pyridine-6-sulfonyl chloride
4-(Chloromethyl)-6-(difluoromethyl)-2-methoxypyridine-3-carboxylic acid