4-(Difluoromethyl)-5-hydroxy-2-iodopyridine-3-acetic acid
4-(Difluoromethyl)-3-hydroxy-5-iodopyridine-2-acetic acid
4-Chloro-3-chloromethyl-2-hydroxypyridine
3-Chloro-2-chloromethyl-4-hydroxypyridine
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