4-Methoxy-6-nitro-3-(trifluoromethoxy)pyridine-2-carboxaldehyde
2-Methoxy-3-nitro-6-(trifluoromethoxy)-4-(trifluoromethyl)pyridine
3-Methoxy-5-nitro-2-(trifluoromethoxy)pyridine-4-carboxaldehyde
3-Iodo-5-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-2-carboxaldehyde