Ethyl 2-hydroxy-3-nitro-6-(trifluoromethoxy)pyridine-5-acetate
3-(Difluoromethyl)-5-hydroxy-2-(trifluoromethoxy)pyridine-6-acetonitrile
Methyl 4-(difluoromethyl)-6-hydroxy-2-(trifluoromethoxy)pyridine-3-acetate
Ethyl 2-hydroxy-3-nitro-5-(trifluoromethoxy)pyridine-4-acetate