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