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Dammarane-type glycosides from steamed notoginseng
Peng-Ying Liao1, Dong Wang, Ying-Jun Zhang
1State Key Laboratory of Phytochemistry and Plant Resources of West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China.
Abstract:
Notoginseng, the root of Panax notoginseng (Burk.) F. H. Chen (Araliaceae), is a Chinese traditional medicine, which is used in both raw and processed forms due to their different pharmacological activities. Detailed chemical investigation on steamed notoginseng led to the isolation of 27 dammarane-type triterpenoids (1-27), including 4 new glycosides, namely, notoginsenosides ST-1-ST-3 and ST-5 (1-4), in addition to 3 other known compounds. Of the new compounds, 1-3 possess new aglycones. Their structures were elucidated on the basis of detailed analyses of their 1D and 2D NMR spectra and chemical reactions. The known compounds, koryoginsenoside-R1 (19), yesanchinoside D (20), 6''-O-acetylginsenoside Rg3 (24), and 3beta,6alpha,12beta-trihydroxydammar-20(21),24-diene ( 25), were isolated from notoginseng for the first time.