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