Ethyl 4-hydroxy-5-nitro-3-(trifluoromethoxy)pyridine-2-carboxylate
Methyl 4-(difluoromethyl)-3-hydroxy-2-(trifluoromethoxy)pyridine-5-carboxylate
3-Hydroxy-2-nitro-4-(trifluoromethoxy)pyridine-6-acetic acid
Methyl 4-(difluoromethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine-5-carboxylate