Diarylheptanoids from the root of Curcuma aromatica and their antioxidative effects

Four rare diarylheptanoids containing tetrahydropyran moieties (1–4) and five known diarylheptanoids (6–10) were isolated from the n-BuOH fraction of 75% ethanol extract from the root of Curcuma aromatica, along with a new phenol (5). Their planar and stereochemical structures were established using HRESIMS and spectroscopic methods, including ECD data. All compounds (1–10) exhibited antioxidant effects on the model of H2O2-induced damage in...