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