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