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