Zhou, Xianli Huang, Sixin Wang, Pengcheng Luo, Qin Huang, Xiao Xu, Qin Qin, Jiangke Liang, Chengqin Chen, Xu A syringic acid derivative and two iridoid glycosides from the roots of <i>Stachys geobombycis</i> and their antioxidant properties <p>A new derivative of syringic acid, stageobester A (<b>1</b>) and two iridoid glycosides which including a new one, stageoboside A (<b>2</b>), were isolated from the roots of <i>Stachys geobombycis</i>. Their structures were elucidated on the basis of spectroscopic methods, including extensive NMR and MS spectra. In addition, all the isolates were tested for their antioxidant capacity. Compounds <b>1</b> and <b>2</b> showed moderate antioxidant activities against DPPH radical, with IC<sub>50</sub> values of 113.33 ± 1.53 and 40.33 ± 2.08 mg/L, respectively.</p> Stachys geobombycis;syringic acid derivative;iridoid glycoside;antioxidant 2017-11-23
    https://tandf.figshare.com/articles/journal_contribution/A_syringic_acid_derivative_and_two_iridoid_glycosides_from_the_roots_of_i_Stachys_geobombycis_i_and_their_antioxidant_properties/5628733
10.6084/m9.figshare.5628733.v1