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