2-Bromo-5-fluoro-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
4-Amino-5-methyl-3-(trifluoromethoxy)pyridine-2-sulfonamide
4-Amino-3-methyl-2-(trifluoromethoxy)pyridine-5-sulfonamide
2-Bromo-4-fluoro-3-(trifluoromethoxy)pyridine-5-sulfonyl chloride