2-Methyl-5-nitro-4-(trifluoromethoxy)pyridine-3-carbonyl chloride
6-Methyl-4-nitro-2-(trifluoromethoxy)pyridine-3-carbonyl chloride
3-(Difluoromethyl)-4-nitro-5-(trifluoromethoxy)pyridine-2-carboxylic acid
3-(Difluoromethyl)-2-nitro-6-(trifluoromethoxy)pyridine-5-carboxylic acid