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Quadranoside VI

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-dien-28-oic Acid

Biological source: Combretum quadrangulare [1]

C36H56O11: 664.382

[α]D25 + 23.8° (c 0.036, MeOH) [1]

IR (KBr) νmax cm−1: 3450, 1730, 1640 [1]

HR-FAB-MSm/z: 687.3712 [M + Na]+ [1]

1H NMR (400 MHz, J/Hz, C5D5N): 1.47 (m, H-1), 2.42 (dd, J = 12.7, 5.5, H-1), 4.39 (m, H-2), 4.23 (d, J = 9.3, H-3), 1.98 (m, H-5), 5.43 (brs, H-6), 1.81, 2.01 (m, H2-7), 1.87 (m, H-9), 2.15, 2.28 (m, H2-11), 5.72 (t, J = 2.5, H-12), 1.26, 2.49 (m, H2-15), 2.00 (m, H-16), 3.55 (s, H-18), 1.72, 1.75 (m, H2-21), 1.93 (m, H-22), 4.03 (d, J = 10.5, H-23), 4.39 (d, J = 10.5, H-23), 1.73 (s, CH3-24), 1.80 (s, CH3-25), 1.69 (s, CH3-26), 1.00 (s, CH3-27), 1.63 (s, CH3-29), 1.57 (s, CH3-30)

β-D-Glcp: 6.31 (d, J = 8.1, H-1), 4.18 (dd, J = 8.8, 8.1, H-2), 4.27 (dd, J = 9.0, 8.8, H-3), 4.37 (m, H-4), 3.98 (m, H-5), 4.39 (m,...

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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