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