6-Cyano-2-methoxy-4-(trifluoromethoxy)pyridine-3-carboxaldehyde
2-Cyano-6-methoxy-3-(trifluoromethoxy)pyridine-4-carboxaldehyde
6-Cyano-3-methoxy-4-(trifluoromethoxy)pyridine-2-carboxaldehyde
2-Cyano-5-methoxy-3-(trifluoromethoxy)pyridine-4-carboxaldehyde