28-O-Glucopyranosyl-6β,23-dihydroxy-tormentic Acid

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Ursene Type – 6β,23-Dihydroxy-tormentic Acid

Biological source: Combretum quadrangulare [1], Aphloia madagascariensis [2]

C36H58O12: 682.392

Mp: 205–208°C [2]

[α]D25−8° (c 0.1, MeOH) [2]

CPD-MSm/z: 706 [M + H + Na]+, 523 [M-Hexose + 4H]+, 544 [M + Na-Hexose + 2H]+ [2]

1H NMR (300 MHz, J/Hz, C5D5N): 0.88 (brt, J = 12, H-1), 0.93 (d, J = 6.6, CH3-30), 1.00 (m, H-15), 1.04 (s, CH3-26), 1.06 (s, CH3-24), 1.21 (s, CH3-29), 1.25 (m, H-21), 1.31 (s, CH3-27), 1.3 (m, H-5), 1.34 (m, H-20), 1.39 (s, CH3-25), 1.48 (dd, J = 13.0, 2.0, H-7), 1.63 (m, H-16), 1.65 (m, H-22), 1.70 (m, H-21), 1.80 (m, H-22, H-9), 1.81 (brd, J = 13.0, H-7), 1.87 (m, H-15), 1.9 (dd, J = 12.0, 3.5, H-1), 2.08 (m, H-11), 2.1 (m, H-11), 2.53 (s, H-18), 2.6 (td, J = 13.3, 4.1, H-16), 3.3 (m, H-3), 3.44 (d, J = 11.1, H-23), 3.58 (d, J = 11.1, H-23), 3.74 (td, J = 11.0, 3.5, H-2), 4.4 (brs,...

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.
    M.G. Dijoux, C. Lavaud, G. Massiot, L.L. Men-Olivier, D.M. Sheeley, Phytochemistry 34, 497 (1993)CrossRefGoogle Scholar

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