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