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