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