3-Nitro-5-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-6-carboxylic acid
5-Nitro-4-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-3-carboxylic acid
3-Nitro-4-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-6-carboxylic acid
3-Nitro-5-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-2-carboxylic acid