Dammarane-type glycosides and long chain sesquiterpene glycosides from Gynostemma yixingense |
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Authors: | Wen-Juan Xiang Chun-Yu Guo Lei Ma Li-Hong Hu |
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Institution: | 1. School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, PR China;2. Shanghai Research Center for Modernization of Traditional Chinese Medicine, Shanghai Institute of Materia Medica, Shanghai, 201203, PR China |
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Abstract: | A new dammarane-type glycoside and a new long chain sesquiterpene glycoside, along with nine known compounds 20(S)-ginsenoside Rh1 (3), 20(R)-ginsenoside Rh1 (4), ginsenoside F1 (5), amarantholidoside IV (6), ginsenoside Rc (7), 20(S)-ginsenoside Rg2 (8), 20(R)-ginsenoside Rg2 (9), ginsenoside Rd (10) and gypenoside XLVI (11) were isolated from Gynostemma yixingense. The structures of the new compounds were determined on the basis of spectroscopic analysis, including 1D-, 2D-NMR and ESI-MS techniques as well as by comparison of the spectral data with those of related compounds as 2α,3β,20(S)-trihydroxydammar-24-ene-3-O-β-d-glucopyranosyl((1 → 2)-β-d-glucopyranosyl]-20-O-β-d-xylopyranosyl((1 → 6)-β-d-glucopyranoside] (1) (2E,6E)-10-β-d-glucopyranosyl-1,10,11-trihydroxy-3,7,11-trimethyldodeca-2,6-diene (2). |
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Keywords: | Gynostemma yixingense Dammarane-type glycoside Long chain sesquiterpene glycoside |
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