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