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