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