Triterpenoids with Antiplatelet Aggregation Activity from the Roots of Ilex pubescens
Qinglong Tan1,2, Maosong Qiu1, Di Cao1
1School of Chinese Materia medica, Guangzhou University of Chinese Medicine, Guangzhou, China.
Abstract:
Two new triterpenes and five new triterpene saponins, named ilexpusons A-G (1-7), as well as eight known compounds were isolated from Ilex pubescens. The structures of the new compounds were established by a combination of chemical and spectroscopic methods, including HRESIMS, 1H-NMR, 13C-NMR, 1H-1H COSY, HSQC, HMBC, and NOESY. Additionally, the biological activity of compounds 1 - 15 against adenosine diphosphate-induced platelet aggregation in rabbit plasma was determined. Among the tested compounds, 1, 2, 5, 6, 8, 13, 14, and 15 exhibited significant inhibition of platelet aggregation in vitro.
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