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Quadranoside VIII

Reference work entry

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Ursene Type – 2α,3β,23-Trihydroxy-urs-12,19(29)-dien-28-oic Acid

Biological source: Combretum quadrangulare [1]

C36H50O10: 642.340

[α]D25 + 73.2° (c 0.028, MeOH) [1]

IR (KBr) νmax cm−1: 3400, 1710, 1640 [1]

HR-FAB-MSm/z: 671.3774 [M + Na]+ [1]

1H NMR (400 MHz, J/Hz, C5D5N): 1.38 (m, H-1), 2.27 (dd, J = 12.5, 3.6, H-1), 4.18 (m, H-2), 4.17 (m, H-3), 1.81 (m, H-5), 1.68 (m, H-6), 1.36, 1.65 (m, H2-7), 1.96 (m, H-9), 2.05 (m, H-11), 5.50 (t, J = 2.6, H-12), 1.38, 2.38 (m, H2-15), 1.69, 1.86 (m, H2-16), 3.76 (s, H-18), 1.79 (m, H-20), 1.25, 1.43 (m, H2-21), 1.79, 1.97 (m, H2-22), 3.69 (d, J = 9.6, H-23), 4.17 (d, J = 9.6, H-23), 1.05 (s, CH3-24), 1.09 (s, CH3-25), 1.15 (s, CH3-26), 1.14 (s, CH3-27), 5.00, 5.12 (brs, CH2-29), 1.03 (d, J = 6.7, CH3-30)

β-D-Glcp: 6.29 (d, J = 8.2, H-1), 4.18 (m, H-2), 4.27 (t, J = 9.2, H-3), 4.33 (t, J = 9.2, H-4), 4.02 (ddd,...

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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