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