2-(Difluoromethyl)-4-hydroxy-3-iodopyridine-6-sulfonamide
3-(Difluoromethyl)-2-hydroxy-6-methoxy-4-nitropyridine
2-(Bromomethyl)-4-(difluoromethyl)-3-hydroxy-6-methoxypyridine
5-(Chloromethyl)-2-(difluoromethyl)-3-hydroxy-4-methoxypyridine
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