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