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Cayaponoside A3

Reference work entry

CAS Registry Number: 162857-56-9 Open image in new window

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

Biological source: Cayaponia tayuya [1]

C39H60O12: 720.408

Mp: 138–140°C [1]

[α]D26 − 8.9° (c 0.74, MeOH) [1]

UV λmaxMeOH nm (log ε): 205 (4.54), 220 (shoulder, 4.14), 281 (3.34) [1]

FAB-MSm/z: 719 [M-H], 557[M-H-162], 385 [1]

1H NMR (J/Hz): 6.66 (s, H-1), ca 2.65, 2.80 (m, H2-6), ca 1.95, 2.25 (m, H2-7), 2.15 (brd, J = 7, H-8), 2.62, 2.78 (d, J = 14, H2-12), 1.60 (d, J = 13, H-15), 1.95 (m, H-15), 4.57 (t-like, J = 7, H-16), 2.31 (d, J = 7, H-17), 0.96 (s, CH3-18), 1.30 (s, CH3-19), 1.21 (s, CH3-21), 4.05 (t, J = 7, H-22), 1.90 (m, H2-23), ca 1.70 (m, H2-24), 1.23 (s, CH3-26), 1.23 (s, CH3-27), 2.09 (s, CH3-28), 1.01 (s, CH3-30), 0.84 (t, J = 7), ca 1.4 (m, 2H), ca 3.28 (m, OBu)

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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