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Quadranoside XI

Reference work entry

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Miscellaneous Glycosides – 2α,23-Dihydroxy-betulinic Acid

Biological source: Combretum quadrangulare [1]

C43H62O15: 818.408

[α]D25 + 7.9° (c 0.045, MeOH) [1]

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

HR-FAB-MSm/z: 841.3972 [M + Na]+ [1]

1H NMR (400 MHz, J/Hz, C5D5N): 1.18 (m, H-1), 2.31 (dd, J = 12.4, 4.4, H-1), 4.35 (m, H-2), 3.98 (d, J = 9.3, H-3), 1.79 (m, H-5), 4.77 (brs, H-6), 1.77 (m, H-7), 1.49 (m, H-9), 1.40, 1.52 (m, H2-11), 1.18, 1.88 (m, H2-12), 2.74 (ddd, J = 11.8, 2.7, H-13), 1.12, 2.02 (m, H2-15), 1.38 (m, H-16), 2.57 (brd, J = 12.4, H-16), 1.67 (m, H-18), 3.37 (td, J = 4.9, 10.7, H-19), 1.39, 2.02 (m, H2-21-H), 1.41, 2.15 (m, H2-22), 4.72 (d, J = 11.2, H-23), 4.89 (d, J = 11.2, H-23), 1.66 (s, CH3-24), 1.55 (s, CH3-25), 1.68 (s, CH3-26), 0.85 (s, CH3-27), 4.74 (brs, H-29), 4.85 (brs, H-29), 1.74 (s, CH3-30)

β-D-Glcp: 6.28 (d, J = 8.3, H-1), 4.07 (dd, J = 8.5, 8.3,...

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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