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