2-(Difluoromethyl)-3-fluoro-6-iodopyridine-4-sulfonyl chloride
5-(Difluoromethyl)-2-fluoro-3-hydroxypyridine-4-sulfonyl chloride
4-(Difluoromethyl)-3-fluoro-5-hydroxypyridine-2-sulfonyl chloride
4-(Difluoromethyl)-3-fluoro-2-hydroxypyridine-5-sulfonyl chloride