3,4-Dihydroxy-2-(trifluoromethoxy)pyridine-5-carbonyl chloride
2,6-Dihydroxy-3-(trifluoromethoxy)pyridine-5-carbonyl chloride
3,6-Dihydroxy-4-(trifluoromethoxy)pyridine-2-carbonyl chloride
4-Cyano-3-nitro-2-(trifluoromethoxy)pyridine-5-carbonyl chloride