Methyl 5-(difluoromethyl)-4-hydroxy-2-(trifluoromethoxy)pyridine-3-carboxylate
Methyl 2-(bromomethyl)-3-hydroxy-6-(trifluoromethoxy)pyridine-5-carboxylate
Methyl 2-(bromomethyl)-3-hydroxy-5-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 3-(difluoromethyl)-4-hydroxy-5-(trifluoromethoxy)pyridine-2-carboxylate