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