2-Amino-3-(difluoromethyl)-6-fluoropyridine-4-sulfonamide
3-(Chloromethyl)-6-(difluoromethyl)-2-fluoro-5-iodopyridine
3-Bromo-4-fluoropyridine-5-sulfonyl chloride
2-Bromo-4-fluoropyridine-5-sulfonyl chloride
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