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