| Structure Identification: |
| Helvetica Chimica Acta, 2010 , 92 (12) :2737-2745. | | Six New Triterpenoid Glycosides from Gynostemma pentaphyllum.[Reference: WebLink] |
METHODS AND RESULTS:
Six new triterpenoid glycosides, gynosaponins I–VI (Gynosaponin I , gynosaponin Ⅱ, gynosaponin Ⅲ, gynosaponin Ⅳ, gynosaponin Ⅴ, gynosaponin Ⅵ,1–6, resp.), together with three known compounds, ginseng Rb1 (7), gypenoside XLIX (8), and gylongiposide I (9), were isolated from the aerial parts of Gynostemma pentaphyllum.
CONCLUSIONS:
Based on ESI-MS, IR, 1D- and 2D-NMR data (HMQC, HMBC, COSY, and TOCSY), the structures of the new compounds were determined as (3β,12β,20S)-trihydroxydammar-24-ene 20-O-[α-rhamnopyranosyl-(1→2)]-β-glucopyranoside (1), (3β,12β,20S)-trihydroxydammar-24-ene 20-O-[α-rhamnopyranosyl-(1→2)] [α-rhamnopyranosyl-(1→3)]-β-glucopyranoside (2), (3β,12β,20S)-trihydroxydammar-24-ene 3-O-β-glucopyranosyl-20-O-[α-rhamnopyranosyl-(1→2)]-β-glucopyranoside (3), (3β,12β,20S)-trihydroxydammar-24-ene 3-O-β-glucopyranosyl-20-O-[α-rhamnopyranosyl-(1→2)] [α-rhamnopyranosyl-(1→3)]-β-glucopyranoside (4), (3β,12β,20S)-trihydroxydammar-24-ene 3-O-{[β-glucopyranosyl-(1→2)]-β-glucopyranosyl}-20-O-[α-rhamnopyranosyl-(1→2)]-β-glucopyranoside (5), and (3β,12β,20S)-trihydroxydammar-24-ene 3-O-{[β-glucopyranosyl-(1→2)]-β-glucopyranosyl}-20-O-[α-rhamnopyranosyl-(1→2)] [α-rhamnopyranosyl-(1→3)]-β-glucopyranoside (6). |
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