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Cayaponoside A

Reference work entry

CAS Registry Number: 147742-04-9 Open image in new window

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

Biological source: Cayaponia tayuya [1]

C37H54O13: 706.356

Mp: 142–146°C [1]

[α]D26 − 26° (c 1.30, MeOH) [1]

UV λmaxMeOH nm (log ε): 205 (4.40), 220 (3.91), 284 (3.28) [1]

FAB-MSm/z: 705 [M-H]-, 543 [M-H-162]-, 483 [M-H-162-AcOH]-, 385 [1]

HR-FAB-MSm/z: 729.3466 [M + Na]+ [1]

1H NMR (J/Hz): 6.67 (s, H-1), ca 2.65, 2.85 (H2-6), ca 1.95, 2.25 (m, H2-7), 2.13 (brd, J = 7, H-8), 2.63, 2.91 (d, J = 14, H2-12), 1.50 (d, J = 13), ca 1.97 (m, H2-15), 4.43 (brdd, J = 7, 9, H-16), 2.48 (d, 7, H-17), 0.95 (s, CH3-18), 1.31 (s, CH3-19), 1.35 (s, CH3-21), ca 2.70, 2.80 (m, H2-23), ca 1.95 (m, H2-24), 1.42 (s, CH3-26), 1.42 (s, CH3-27), 2.09 (s, CH3-28), 0.99 (s, CH3-30), 1.92 (Ac)

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,...

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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