2,3-Dibromo-6-(difluoromethyl)pyridine-5-sulfonyl chloride
3-(Difluoromethyl)-2-(trifluoromethyl)pyridine-4-sulfonyl chloride
2,3-Dibromo-5-(difluoromethyl)pyridine-4-sulfonyl chloride
2-(Difluoromethyl)-4-(trifluoromethyl)pyridine-3-sulfonyl chloride