Fig. 3From: Vanda roxburghii chloroform extract as a potential source of polyphenols with antioxidant and cholinesterase inhibitory activities: identification of a strong phenolic antioxidantChemical structure of gigantol (a) and its IC50 (mean ± SD) values for DPPH and hydroxyl radical (OH) scavenging and for inhibition of lipid peroxidation (LPO). * values significantly different (P < 0.05) from the reference standard catechinBack to article page