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