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Cayaponoside C5b

Reference work entry

CAS Registry Number: 133882-82-3 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Cucurbitane Type – 23,24-Dihydro-25-hydroxy-6-en-fevicordin A

Biological source: Cayaponia tayuya [1]

C35H50O12: 662.330

Mp: 168–170°C [1]

[α]D26 − 138.2° (c 1.16, MeOH) [1]

UV λmaxMeOH nm (log ε): 205 (4.03), 233 (4.36), 274 (3.83), 284 (3.81), 303 (3.45), 315 (3.35) [1]

FAB-MSm/z: 661 [M-H], 499 [M-H-162], 383 [1]

HR-FAB-MSm/z: 685.3195 [M + Na]+ [1]

1H NMR (J/Hz): 6.57 (s, H-1), 6.87 (d, J = 10, H-6), 5.80 (dd, J = 6, 10, H-7), 2.56 (d, J = 6, H-8), 2.72, 3.02 (dd, 15, H2-12), 1.32 (d, 14), 2.03 (dd, 9, 14, H2-15), 4.43 (t-like, 7, H-16), 2.47 (d, J = 7, H-17), 0.94 (s, CH3-18), 1.22 (s, CH3-19), 1.38 (s, CH3-21), 2.7-2.8 (m, H2-23), ca 1.7 (m, H2-24), 1.17 (s, CH3-26), 1.17 (s, CH3-27), 2.22 (s, CH3-28), 1.01 (s, CH3-30)

β-D-Glcp: 4.61 (d, J = 7, H-1), 3.40–3.55 (H-2, 3, 4), 3.31 (m, H-5), 3.83 (dd, J = 4, 12,...

References

  1. 1.
    E. Himeno, T. Nagao, J. Honda, H. Okabe, N. Irino, T. Nakasumi, Chem. Pharm. Bull. 42(11), 2370 (1994)CrossRefGoogle Scholar

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