6-(Chloromethyl)-2-(difluoromethyl)-3,4-dihydroxypyridine
2-(Bromomethyl)-3-(difluoromethyl)-4,5-dihydroxypyridine
2-Amino-6-chloro-4-(difluoromethyl)-3-hydroxypyridine
3-(Aminomethyl)-4-(difluoromethyl)-2,5-dihydroxypyridine
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