6-Methoxy-3-nitro-4-(trifluoromethoxy)pyridine-2-carboxaldehyde
2-Methoxy-5-nitro-3-(trifluoromethoxy)pyridine-4-carboxaldehyde
4-(Bromomethyl)-6-methoxy-2-(trifluoromethoxy)pyridine-3-carboxylic acid
6-Methoxy-4-nitro-3-(trifluoromethoxy)pyridine-2-carboxaldehyde