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