5-(Difluoromethyl)-2-(trifluoromethyl)pyridine-4-sulfonyl chloride
4-(Difluoromethyl)-3-(trifluoromethyl)pyridine-5-sulfonyl chloride
4-(Difluoromethyl)-2-(trifluoromethyl)pyridine-5-sulfonyl chloride
2,3-Dichloro-4-(difluoromethyl)pyridine-6-carboxylic acid