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