Fargosides A-E, Triterpenoid Saponins from Holboellia fargesii.

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  • FU Hongzheng
    Department of Pharmacognosy, School of Pharmaceutical Sciences, Toho University National Laboratory of Natural and Biomimetic Drugs, Peking University
  • KOIKE Kazuo
    Department of Pharmacognosy, School of Pharmaceutical Sciences, Toho University
  • ZHENG Quan
    Department of Pharmacognosy, School of Pharmaceutical Sciences, Toho University
  • MITSUNAGA Katsuyoshi
    Department of Pharmacognosy, School of Pharmaceutical Sciences, Toho University
  • JIA Zhonghua
    Department of Pharmacognosy, School of Pharmaceutical Sciences, Toho University
  • NIKAIDO Tamotsu
    Department of Pharmacognosy, School of Pharmaceutical Sciences, Toho University
  • LIN Wenhan
    National Laboratory of Natural and Biomimetic Drugs, Peking University
  • GUO Dean
    National Laboratory of Natural and Biomimetic Drugs, Peking University
  • ZHANG Lihe
    National Laboratory of Natural and Biomimetic Drugs, Peking University

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Five new triterpenoid saponins, fargosides A, B, C, D, and E, were isolated from the roots of Holboellia fargesii. The structures of fargosides A-E were elucidated on the basis of chemical and physicochemical evidence and found to be 3β, 20α-dihydroxy-29-norolean-12-en-28-oic acid 3-O-β-D-xylopyranosyl-(1→2)-β-D-glucopyranoside (1), 3β, 20α, 24-trihydroxy-29-norolean-12-en-28-oic acid 23-O-β-D-fucopyranosyl-(1→2)-[α-L-arabinopyranosyl-(1→3)]-β-D-glucopyranoside (2), 3β, 23-dihydroxy-30-norolean-2, 20(29)-dien-28-oic acid 3-O-α-L-arabinopyranosyl-(1→2)-[β-D-glucopyranosyluronic acid-(1→3)]-α-L-arabinopyranoside (3), 3β, 23-dihydroxy-30-norolean-12, 20(29)-dien-28-oic acid 3-O-methyl β-D-glucopyranosyluronate-(1→3)-α-L-arabinopyranoside (4), and 3β, 23-dihydroxy-olean-12-en-28-oic acid 3-O-methyl β-D-glucopyranosyluronate-(1→3)-α-L-arabinopyranoside (5), respectively.

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