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Combreglucoside

Reference work entry

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Oleanene Type – 2α,3β,6β,19α,24-Pentahydroxy-olean-12-en-28-oic Acid

Biological source: Combretum quadrangulare [1], C. nigricans [2]

C36H58O12: 682.392

Mp: 260°C (MeOH) [2]

[α]D21 + 0° (c 1.0, C5H5N) [2]

IR (KBr) νmax cm−1: 3394, 2934, 1730, 1644, 1595, 1381, 1137, 1098, 591 [2]

CI-MSm/z: 538 [M-Glc + NH4]+, 521 [M-Glc + H]+ [2]

FAB-MSm/z: 705 [M + Na]+ (27), 503 (12), 429 (19), 391 (9), 360 (8), 321 (17), 269 (26), 252 (75), 237 (84), 215 (100) [1]

1H NMR (300 MHz, J/Hz, C5D5N): 0.92, 1.10, 1.51, 1.69, 1.70, 1.75 (s, CH3-30, 29, 27, 24, 26, 25), 1.00 (brt, H-21), 1.39 (brt, J = 13.0, H-1), 1.25 (brd, J-13.0, H-15), 1.90 (m, H-22), 1.93 (brs, H-5), 1.97 (m, H-21), 2.00 (m, H2-7, H-22), 2.10 (m, H-16), 2.15 (m, H-11), 2.16 (m, H-9), 2.30 (dd, J = 13.0, 4.0, H-1), 2.34 (m, H-11), 2.45 (brt, J = 13, H-15), 2.78 (brt, J = 13.0, H-16), 3.46 (brs, H-18),...

References

  1. 1.
    I.K. Adnyana, Y. Tezuka, S. Awale, A.H. Banskota, K.Q. Tran, S. Kadota, Chem. Pharm. Bull. 48, 1114 (2000)CrossRefGoogle Scholar
  2. 2.
    A. Jossang, M. Seuleiman, E. Maidou, B. Bodo, Phytochemistry 41, 591 (1996)CrossRefGoogle Scholar

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