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Quadranoside IX

Reference work entry

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Ursene Type – 6β,23-Dihydroxy-tormentic Acid

Biological source: Combretum quadrangulare [1]

C43H62O16: 834.403

[α]D25 + 24.4° (c 0.045, MeOH) [1]

IR (KBr) νmax cm−1: 3400, 1710, 1645 [1]

1H NMR (400 MHz, J/Hz, C5D5N): 1.11 (m, H-1), 2.29 (dd, J = 11.0, 3.6, H-1), 4.33 (m, H-2), 3.92 (d, J = 9.5, H-3), 1.88 (m, H-5), 4.86 (brs, H-6), 1.86, 2.07 (m, H2-7), 2.02 (m, H-9), 2.09 (m, H-10), 5.59 (t, J = 2.5, H-12), 1.15 (m, H-15), 2.45 (td, J = 12.5, 4.6, H-15), 1.49 (m, H-16), 2.96 (td, J = 13.4, 4.6, H-16), 2.92 (s, H-18), 1.36 (m, H-20), 1.74 (m, H-21), 1.76, 2.03 (m, H2-22), 4.73 (d, J = 11.2, H-23), 4.88 (d, J = 11.2, H-23), 1.73 (s, CH3-24 ), 1.77 (s, CH3-25), 1.72 (s, CH3-26), 1.69 (s, CH3-27), 1.38 (s, CH3-29), 1.05 (d, J = 6.6, CH3-30)

β-D-Glcp: 6.20 (d, J = 8.1, H-1), 4.15 (dd, J = 8.5, 8.1, H-2), 4.22 (dd, J = 8.8, 8.5, H-3), 4.30 (dd, J = 9.3,...

References

  1. 1.
    I.K. Adnyana, Y. Tezuka, S. Awale, A.H. Banskota, K.Q. Tran, Sh. Kadota, Chem. Pharm. Bull. 48, 1114 (2000)CrossRefGoogle Scholar

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