Ethyl 2-(difluoromethyl)-6-hydroxy-3-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 4-iodo-6-methyl-2-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 6-(difluoromethyl)-3-hydroxy-2-(trifluoromethoxy)pyridine-4-carboxylate
Ethyl 2-(difluoromethyl)-5-hydroxy-3-(trifluoromethoxy)pyridine-6-carboxylate