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