Ethyl 3-hydroxy-2-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-6-carboxylate
Ethyl 6-hydroxy-3-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-4-carboxylate
Ethyl 2-hydroxy-4-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-3-carboxylate
Methyl 4-hydroxy-3-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-2-carboxylate