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Cayaponoside B

Reference work entry

CAS Registry Number: 147742-05-0 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Cucurbitane Type – 22-Hydroxy-25-en-fevicordin A

Biological source: Cayaponia tayuya [1]

C35H50O11: 646.335

Mp: 172–174°C [1]

[α]D26 − 8.3° (c 1.16, MeOH) [1]

UV λmaxMeOH nm (log ε): 206 (4.46), 220 (4.13), 282 (3.37) [1]

FAB-MSm/z: 645 [M-H], 483 [M-H-162], 385 [1]

HR-FAB-MSm/z: 669.3257 [M + Na]+ [1]

1H NMR (J/Hz): 6.64 (s, H-1), ca 2.66, 2.86 (m, H2-6), ca 1.95, 2.25 (m, H2-7), 2.15 (brd, J = 7, H-8), 2.60, 2.76 (d, J = 14, H2-12), 1.60 (d, J = 14), 1.95 (m, H2-15), 4.63 (t-like, J = 8, H-16), 2.38 (d, J = 6, H-17), 1.00 (s, CH3-18), 1.30 (s, CH3-19), 1.19 (s, CH3-21), 4.08 (dd, J = 1, 6, H-22), 5.79 (dd, J = 6, 16, H-23), 6.36 (dd, J = 1, 16, H-24), 4.94 (s, H2-26), 1.82 (s, CH3-27), 2.09 (s, CH3-28), 0.98 (s, CH3-30)

β-D-Glcp: 4.57 (d, J = 7, H-1), 3.45–3.49 (H-2, 3, 4), 3.31 (m, H-5), 3.84 (dd, J = 4, 12, Ha-6),...

References

  1. 1.
    E. Himeno, T. Nagao, J. Honda, H. Okabe, N. Irino, T. Nakasumi, Chem. Pharm. Bull. 42(11), 2295 (1994)CrossRefGoogle Scholar

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