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