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Cayaponoside B4

Reference work entry

CAS Registry Number: 151703-09-2 Open image in new window

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

Biological source: Cayaponia tayuya [1]

C36H54O12: 678.361

Mp: 160–164°C [1]

[α]D26 − 2.6° (c 1.00, MeOH) [1]

UV λmaxMeOH nm (log ε): 207 (4.42), 220 (shoulder, 4.11), 282 (3.37) [1]

FAB-MSm/z: 677 [M-H], 515[M-H-162], 385 [1]

HR-FAB-MSm/z: 701.3530 [M + Na]+ [1]

1H NMR (J/Hz): 6.63 (s, H-1), ca 2.65, 2.85 (m, H2-6), ca 1.98, 2.25 (m, H2-7), 2.15 (brd, J = 7, H-8), 2.60, 2.75 (d, J = 14, H2-12), 1.60 (d, J = 13), 1.99 (dd, J = 8, 13, H2-15), 4.63 (t-like, J = 8, H-16), 2.33 (d, J = 7, H-17), 1.00 (s, CH3-18), 1.30 (s, CH3-19), 1.22 (s, CH3-21), 4.01 (d, J = 5, H-22), 5.76 (dd, J = 5, 16, H-23), 5.68 (d, J = 16, H-24), 1.24 (s, CH3-26), 1.24 (s, CH3-27), 2.09 (s, CH3-28), 0.96 (s, CH3-30), 3.13 (s, OMe)

β-D-Glcp: 4.57 (d, J = 7, H-1), 3.45-3.49 (H-2, 3, 4), 3.31 (m,...

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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