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