The structure is necessary for action against free radicals is 1. Structure Catechol (ortho-diphenolic group) act as Hydrogen. Donating and can be caught with chelating and around Lo metal type iron and copper
2.Double bond position, with the 2-3 sleep gate and the 4-oxo Ju increases the stability of the radicals flavonoids phenolic (alpha
3. Hydroxyl position. And with 3 5 flat in the same plane, the delocalization of electron better
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