Validated HPTLC method for determination of ledol and alloaromadendrene in the essential oil fractions of Rhododendron tomentosum plants and in vitro cultures and bioautography for their activity screening

The bioautographic antioxidant HPTLC assays in DPPH and in riboflavin-light-NBT systems as well as the test for xanthine oxidase inhibition were employed for screening of the biological activity of the R. tomentosum essential oils.