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