3-(Difluoromethyl)-2,5-dihydroxypyridine-4-acetic acid
2-(Difluoromethyl)-4,6-dihydroxypyridine-3-acetic acid
6-(Difluoromethyl)-2,4-dihydroxypyridine-3-acetic acid
3-(Difluoromethyl)-4,6-dihydroxypyridine-2-acetic acid
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