5-Hydroxy-3-nitro-2-(trifluoromethoxy)pyridine-4-sulfonyl chloride
2-Hydroxy-4-methoxy-3-(trifluoromethoxy)pyridine-5-carbonyl chloride
3-Fluoro-6-nitro-2-(trifluoromethoxy)pyridine-4-methanol
3-Hydroxy-5-nitro-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride