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Quadranoside VII

Reference work entry

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Ursene Type – 2α,3β,6β,23-Tetrahydroxy-urs-12,19(29)-dien-28-oic Acid

Biological source: Combretum quadrangulare [1]

C36H56O11: 664.382

[α]D25 + 80.4° (c 0.020, MeOH) [1]

IR (KBr) νmax cm−1: 3450, 1730, 1645 [1]

HR-FAB-MSm/z: 687.3726 [M + Na]+ [1]

1H NMR (400 MHz, J/Hz, C5D5N): 1.49 (m, H-1), 2.37 (dd, J = 12.5, 4.1, H-1), 4.42 (m, H-2), 4.25 (m, H-3), 1.97 (m, H-5), 5.08 (brs, H-6), 1.88, 1.98 (m, H2-7), 2.13 (m, H-9), 2.15, 2.30 (m, H2-11), 5.62 (t, J = 2.6, H-12), 1.15, 2.49 (m, H2-15), 1.75, 1.85 (m, H2-16), 3.81 (s, H-18), 1.81 (m, H-20), 1.43 (m, H-21), 1.81, 1.98 (m, H2-22), 4.06 (d, J = 10.4, H-23), 4.39 (d, J = 10.4, H-23), 1.76 (s, CH3-24), 1.82 (s, CH3-25), 1.74 (s, CH3-26), 1.18 (s, CH3-27), 5.05, 5.20 (brs, CH2-29), 1.05 (d, J = 5.8, CH3-30)

β-D-Glcp: 6.28 (d, J = 8.0, H-1), 4.18 (dd, J = 8.7, 8.0, H-2), 4.26 (dd, J = 8.9, 8.7, H-3), 4.34...

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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