Gan, Li-She Ren, Gang Mo, Jian-Xia Zhang, Xiang-Yi Yao, Wei Zhou, Chang-Xin Cycloartane Triterpenoids from <i>Kleinhovia hospita</i> Four new cycloartane triterpenoids, together with the known gardenolic acid B, were isolated from <i>Kleinhovia hospita</i>. The triterpenoids (<b>1</b>−<b>3</b>) contain a unique 21,23-diacetal side-chain, while compound <b>4</b> contains two α,β-unsaturated ketone moieties. Their structures and relative configurations were determined by spectroscopic methods, including 2D NMR and IR. These compounds showed promising hepatoprotective effects on nitrofurantoin-induced cytotoxicity in human liver-derived Hep G2 cells. gardenolic acid B;Hep;Cycloartane Triterpenoids;diacetal;compound 4;IR;Kleinhovia hospita;cycloartane triterpenoids;configuration;cytotoxicity;spectroscopic methods;Kleinhovia hospitaFour;hepatoprotective effects;2 D NMR;ketone moieties 2009-06-26
    https://acs.figshare.com/articles/journal_contribution/Cycloartane_Triterpenoids_from_i_Kleinhovia_hospita_i_/2847457
10.1021/np900029z.s001