4-Bromo-6-(difluoromethyl)-3-methylpyridine-2-sulfonyl chloride
4-Bromo-2-(difluoromethyl)-3-methylpyridine-6-sulfonyl chloride
5-Bromo-2-(difluoromethyl)-3-(trifluoromethyl)pyridine-4-carboxaldehyde
5-Bromo-3-(difluoromethyl)-2-methylpyridine-4-sulfonyl chloride