2-(Difluoromethyl)-5-hydroxy-4-methoxypyridine-3-carboxylic acid
3-(Difluoromethyl)-6-hydroxy-2-methoxypyridine-4-acetic acid
5-(Difluoromethyl)-3-hydroxy-2-methoxypyridine-4-acetic acid
3-(Difluoromethyl)-4-hydroxy-2-methoxy-6-methylpyridine
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