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