Schefflerins A-G, new triterpene glucosides from the leaves of Schefflera arboricola |
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Authors: | Zhao Zhimin Matsunami Katsuyoshi Otsuka Hideaki Shinzato Takakazu Takeda Yoshio Kawahata Masatoshi Yamaguchi Kentaro |
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Institution: | Department of Pharmacognosy, Graduate School of Biomedical Sciences, Hiroshima University, Japan. |
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Abstract: | From the 1-BuOH-soluble fraction of a MeOH extract of leaves of Schefflera arboricola, collected in Okinawa, six new lupane glucosides, named schefflerins A-F (1-6) and one new dammarane glucoside, named schefflerin G (7), were isolated together with three known compounds, citroside A (8), and oleanane saponins, oleanolic acid (9) and echinocystic acid (10) 3-O-α-L-rhamnopyranosyl(1→4')-O-β-D-glucuronopynosides. Their structures were elucidated through a combination of spectroscopic analyses and the structure of schefflerin F (6) was determined by X-ray crystallographic method using SPring-8 synchrotron radiation. |
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