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