2-Bromo-3-(difluoromethyl)-4-fluoro-5-hydroxypyridine
3-Bromo-6-cyano-2-(difluoromethyl)-4-hydroxypyridine
3-Bromo-6-cyano-2-(difluoromethyl)-5-hydroxypyridine
3-Bromo-6-cyano-4-(difluoromethyl)-2-hydroxypyridine
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