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