2-(Difluoromethyl)-4-fluoro-3-methylpyridine-5-sulfonyl chloride
3-(Difluoromethyl)-2-fluoro-5-nitropyridine-4-sulfonyl chloride
3-(Difluoromethyl)-2-fluoro-4-nitropyridine-5-sulfonyl chloride
2-(Difluoromethyl)-3-fluoro-6-methylpyridine-4-sulfonyl chloride