Cayaponoside B3

Reference work entry

CAS Registry Number: 162857-60-5 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Cucurbitane Type – 22-Hydroxy-23-hydro-24-en-fevicordin A

Biological source: Cayaponia tayuya [1]

C35H52O11: 648.350

Mp: 158–163°C [1]

[α]D26 − 3.6° (c 1.04, MeOH) [1]

UV λmaxMeOH nm (log ε): 207 (4.44), 220 (shoulder, 4.11), 281 (3.40) [1]

FAB-MSm/z: 647 [M-H], 485 [M-H-162], 385 [1]

HR-FAB-MSm/z: 671.3412 [M + Na]+ [1]

1H NMR (J/Hz): 6.65 (s, H-1), ca 2.65, 2.86 (m, H2-6), ca 1.95, 2.25 (m, H2-7), 2.15 (d, J = 8, H-8), 2.62, 2.81 (d, J = 14, H2-12), 1.60 (d, J = 14), 1.98 (m, H2-15), 4.58 (t, J = 8, H-16), 2.36 (d, J = 7, H-17), 1.00 (s, CH3-18), 1.31 (s, CH3-19), 1.21 (s, CH3-21), 3.38 (dd, J = 2, 10, H-22), ca 2.08, 2.25 (m, H2-23), 6.36 (brt, J = 7, H-24), 1.60 (s, CH3-26), 1.68 (s, CH3-27), 2.09 (s, CH3-28), 1.00 (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,...

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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