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