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