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