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Cayaponoside B6a

Reference work entry

CAS Registry Number: 151466-42-1 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Cucurbitane Type – 29-Nor-22-hyrdoxy-isocucurbitacin R-3,24-diene

Biological source: Cayaponia tayuya [1]

C35H52O11: 648.350

Mp: 167–172°C [1]

[α]D26 + 43.9° (c 1.01, MeOH) [1]

UV λmaxMeOH nm (log ε): 204 (4.16), 300 (4.09) [1]

FAB-MSm/z: 648 [M]-, 485 [M-H-162]- [1]

HR-FAB-MSm/z: 649.3594 [M + H]+, 487.3060 [M + H-162]+ [1]

1H NMR (400 MHz, J/Hz): 2.21 (dd, J = 5, 14), 2.38 (t, J = 14, H2-1), 6.49 (m, H-6), 2.30, 2.60 (m, H2-7), 2.12 (d, J = 8, H-8), 3.02 (brd, J = 14, H-10), 2.56, 3.18 (d, J = 14, H2-12), 1.55 (d, J = 13), 1.93 (dd, J = 9, 13, H2-15), 4.60 (dd, J = 7, 9, H-16), 2.38 (d, J = 7, H-17), 0.97 (s, CH3-18), 1.11 (s, CH3-19), 1.23 (s, CH3-21), ca 3.36 (H-22), 2.13, 2.28 (m, H2-23), 5.25 (t, J = 7, H-24), 1.70 (s, CH3-26), 1.62 (s, CH3-27), 2.15 (s, CH3-28), 1.31 (s, CH3-30)

β-D-Glcp: 4.72 (d, J = 7, H-1),...

References

  1. 1.
    E. Himeno, T. Nagao, J. Honda, H. Okabe, N. Irino, T. Nakasumi, Chem. Pharm. Bull. 42(11), 2301 (1994)CrossRefGoogle Scholar

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