One new monoterpene glucoside and five dihydroflavonols were isolated for the first time from the aerial parts of Pulicaria jaubertii and identified as p-menthane-2-O-β-D-glucopyranoside , dihydroquercetin (taxifolin) , 7,3′-di-O-methyltaxifolin , 3′-O-methyltaxifolin , 7-O-methyltaxifolin (padmatin)  and 7-O-methyl-dihydrokampferol (7-O-methylaromadenderin) . The structures of these compounds were unambiguously assigned on the basis of NMR spectroscopic data (1H,13C, DEPT, HSQC, HMBC) and MS analysis. 2D-NMR methods required revision of assignments of H-6 and H-8 for dihydroflavonol compounds. Possible cytotoxic activity as well as blood pressure (BP) lowering activity were tested. The alcoholic extract showed cytotoxic activity against prostate carcinoma (PC-3), breast carcinoma (MCF-7) and hepatocellular carcinoma (HepG-2) human cell lines with IC5019.1, 20.0 and 24.1 μg, respectively. The higher dose levels of the alcoholic extract significantly reduced normal BP of rats in a dose-dependent manner.
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