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