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Two new quassinoids, javanicolide E (1) and javanicolide F (2), along with fifteen known C-20 quassinoids were isolated from the seeds of Brucea javanica (L.) Merr. The antitobacco mosaic virus (TMV) activity of these quassinoids was screened by the conventional half-leaf and leaf-disk method along with Western blot analysis. All of the seventeen quassinoids showed potent anti-TMV activity. Among them, eight compounds, brusatol (3), bruceine B (4), bruceoside B (5), yadanzioside I (6), yadanzioside L (7), bruceine D (8), yadanziolide A (9), and aglycone of yadanziolide D (17), showed strong antiviral activities, with IC(50) values in the range of 3.42-5.66 microM, and were much more effective than the positive control, ningnanmycin (IC(50) = 117.3 microM). The antiviral structure-activity relationships of quassinoids against TMV were also discussed.


Xiao-Hui Yan, Jia Chen, Ying-Tong Di, Xin Fang, Jia-Hong Dong, Peng Sang, Yue-Hu Wang, Hong-Ping He, Zhong-Kai Zhang, Xiao-Jiang Hao. Anti-tobacco mosaic virus (TMV) Quassinoids from Brucea javanica (L.) Merr. Journal of agricultural and food chemistry. 2010 Feb 10;58(3):1572-7

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PMID: 20050684

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