5-Hydroxy-4-methoxy-3-(trifluoromethoxy)pyridine-2-sulfonamide
3-Hydroxy-5-methoxy-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride
5-Hydroxy-2-methyl-3-nitro-4-(trifluoromethoxy)pyridine
3-Hydroxy-4-methoxy-5-(trifluoromethoxy)pyridine-2-sulfonyl chloride