Diverse undescribed compounds from the rhizome of Zingiber officinale Rosc. And their anti-inflammatory activity

Abstract

Seven undescribed compounds, including a sesquiterpenoid derivative, a γ-lactone, four gingerols, and a dihydroferulic acid lactate were isolated from the rhizome of Zingiber officinale, and named gingerterpenoid G, gingerlactone A, zingibergingerols A−D and L-dihydroferulic acid lactate, respectively. Zingibergingerols (±)-B and (±)-C were two pairs of enantiomers. The structures of all compounds were determined by 1D-NMR, 2D-NMR and mass spectrometry. The absolute configurations were determined by comparison of the experimental and theoretically calculated ECD curves or X-ray single-crystal diffraction. Bioassay showed that gingerterpenoid G, gingerlactone A, and zingibergingerols A and B exhibited significant anti-inflammatory activity in the model of LPS-induced RAW 264.7 cells.