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One lignanoid compound, isoamericanol B (1), along with four triterpenoid compounds-cis-3-O-p-hydroxycinnamoyloleanolic acid (2), trans-3-O-p-hydroxy cinnamoyloleanolic acid (3), cis-3-O-p-hydroxycinnamoylursolic acid (4), trans-3-O-p-hydroxycinnamoylursolic acid (5) have been isolated for the first time from the leaves of Elaeagnus oldhamii Maxim. Compounds 1-4 significantly inhibited the expression of NO (nitric oxide) produced in lipopolysaccharide (LPS)-stimulated RAW 264.7 cells. The IC50 value for inhibition of nitrite production of compound 1 was about 10.3 ± 0.4 μg/mL. In the cell viability test, however, among compounds 1-4 compound 1 did not significantly change cell viability. Therefore, in this study compound 1 possessed anti-inflammatory effects. The result suggests compound 1 as a potential lead compound for the treatment of inflammatory diseases.

One Lignanoid Compound and Four Triterpenoid Compounds with Anti-Inflammatory Activity from the Leaves of Elaeagnus oldhamii Maxim.