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