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