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