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Cayaponoside A5

Reference work entry

CAS Registry Number: 149777-93-5 Open image in new window

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

Biological source: Cayaponia tayuya [1]

C37H52O13: 704.340

Mp: 149–151°C [1]

[α]D26 − 135.5° (c 0.96, MeOH) [1]

UV λmaxMeOH nm (log ε): 205 (4.20), 232 (4.39), 274 (3.87), 283 (shoulder, 3.84) [1]

FAB-MSm/z: 703 [M-H], 541 [M-H-162], 481 [M-H-162-AcOH], 383 [1]

HR-FAB-MSm/z: 727.3318 [M + Na]+, 667.3089 [M + Na-AcOH]+ [1]

1H NMR (J/Hz): 6.56 (s, H-1), 6.87 (d, J = 10, H-6), 5.79 (dd, J = 6, 10, H-7), 2.55 (d, J = 6, H-8), 2.70, 3.01 (d, J = 14, H2-12), ca 1.35, 2.00 (H2-15), 4.44 (brt, J = 8, H-16), 2.45 (d, J = 8, H-17), 0.94 (s, CH3-18), 1.22 (s, CH3-19), 1.39 (s, CH3-21), 2.7-2.8 (H2-23), ca 2.0 (H2-24), 1.42 (s, CH3-26), 1.43 (s, CH3-27), 2.22 (s, CH3-28), 1.00 (s, CH3-30), 1.92 (s, Ac)

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...

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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