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