Ethyl 2-amino-5-nitro-3-(trifluoromethoxy)pyridine-4-carboxylate
Ethyl 5-amino-3-iodo-4-(trifluoromethoxy)pyridine-2-carboxylate
3-Amino-6-hydroxy-4-(trifluoromethoxy)pyridine-2-acetic acid
Ethyl 3-amino-5-iodo-2-(trifluoromethoxy)pyridine-4-carboxylate