Ethyl 5-amino-4-nitro-2-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 4-amino-3-iodo-6-(trifluoromethoxy)pyridine-2-carboxylate
Ethyl 3-amino-4-nitro-5-(trifluoromethoxy)pyridine-2-carboxylate
Ethyl 4-amino-3-iodo-2-(trifluoromethoxy)pyridine-6-carboxylate