Methyl 2-(bromomethyl)-6-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-5-acetate
2-Methoxy-3-(trifluoromethoxy)pyridine-5-sulfonyl chloride
2-(Difluoromethyl)-6-fluoro-5-iodopyridine-3-sulfonamide
6-(Difluoromethyl)-3-methoxy-2-nitropyridine-4-sulfonyl chloride