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