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Cayaponoside A6

Reference work entry

CAS Registry Number: 162857-58-1 Open image in new window

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

Biological source: Cayaponia tayuya [1]

C35H50O11: 646.335

Mp: 150–154°C [1]

[α]D26 − 27.2° (c 0.95, MeOH) [1]

UV λmaxMeOH nm (log ε): 206 (4.48), 220 (4.12), 281 (3.36) [1]

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

HR-FAB-MSm/z: 669.3248 [M + Na]+ [1]

1H NMR (J/Hz): 6.67 (s, H-1), ca 2.65, 2.83 (m, H2-6), ca 1.95, 2.75 (m, H2-7), 2.13 (brd, J = 7, H-8), 2.64, 2.91 (d, J = 14, H2-12), 1.48 (d, J = 13), 1.94 (dd, J = 9, 13, H2-15), 4.42 (t-like, J = 7, H-16), 2.50 (d, J = 7, H-17), 0.96 (s, CH3-18), 1.31 (s, CH3-19), 1.35 (s, CH3-21), ca 2.75, 2.85 (m, H2-23), ca 2.22 (m, H2-24), 4.68 (brd, J = 5, H2-26), 1.27 (s, CH3-27), 2.09 (s, CH3-28), 0.99 (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), 3.95 (dd, J...

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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