Methyl 2-cyano-6-hydroxy-3-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 6-cyano-3-hydroxy-4-(trifluoromethoxy)pyridine-2-carboxylate
3-Cyano-4-iodo-6-methyl-2-(trifluoromethoxy)pyridine
Methyl 2-cyano-5-hydroxy-3-(trifluoromethoxy)pyridine-4-carboxylate