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