3-(Difluoromethyl)-5-nitro-4-(trifluoromethoxy)pyridine-2-carbonyl chloride
5-(Difluoromethyl)-4-nitro-3-(trifluoromethoxy)pyridine-2-carbonyl chloride
5-(Difluoromethyl)-4-nitro-2-(trifluoromethoxy)pyridine-3-carbonyl chloride
4-(Bromomethyl)-5-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-3-carboxylic acid