3-Hydroxy-6-methoxy-2-(trifluoromethoxy)pyridine-5-carbonyl chloride
5-Hydroxy-4-nitro-2-(trifluoromethoxy)pyridine-3-acetic acid
2-Hydroxy-5-nitro-6-(trifluoromethoxy)pyridine-3-acetic acid
2-Hydroxy-5-nitro-4-(trifluoromethoxy)pyridine-3-acetic acid