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