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