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Cumingianoside Q

Reference work entry

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Miscellaneous Glycosides – 3α,7α,23(R),24(S),25-Pentahydroxy-apotirucallan

Biological source: Dysoxylum cumingianum [1]

C40H66O12: 738.455

[α]D25 −77.5° (c 0.52, CHCl3) [1]

FAB-MS (positive ion mode) m/z: 761.4452 (M + Na)+ [1]

FAB-MSm/z: 737 (M-H)+ [1]

1H NMR (400 MHz, J/Hz, C5D5N-D2O): 4.93 (brs, H-3), 2.45 (brd, J = 13.0, H-5), 4.21 (brs, H-7), 5.60 (brd, J = 2.0, H-15), 0.99 (s, CH3-18), 0.93 (s, CH3-19), 1.13 (d, 6.5, CH3-21), 4.52 (brt, 7.0, H-23), 3.57 (brs, H-24), 1.59 (s, CH3-26), 1.62 (s, CH3-27), 1.11 (s, CH3-28), 0.91 (s, CH3-29), 1.18 (s, CH3-30)

β-D-Glcp: 4.73 (d, J = 7.5, H-1), 3.78 (dd, J = 7.5, 9.0, H-2), 4.13 (t, J = 9.0, H-3), 3.94 (t, J = 9.0, H-4), 3.88 (ddd, J = 2.0, 5.0, 9.0, H-5), 4.62 (dd, J = 5.0, 11.5, H-6), 4.92 (dd, J = 2.0, 11.5, H-6); Acetyl: 1.85 (s), Acetyl′: 2.07 (s) [1]

13 C NMR (100 MHz, C 5D 5N-D 2O): [ 1]

Table 1

C-1

34.2

C-16

36.1

Glc-1

100.3

2

23.4...

References

  1. 1.
    T. Fujioka, A. Sakurai, K. Mihashi, Y. Kashiwada, I-S. Chen, K-H. Lee. Chem. Pharm. Bull. 45, 202 (1997)CrossRefGoogle Scholar

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