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Cayaponoside B6b

Reference work entry

CAS Registry Number: 151466-43-2 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-3,25-diene

Biological source: Cayaponia tayuya [1]

C35H52O11: 648.350

Mp: 165–170°C [1]

[α]D26 + 50.3° (c 1.16, MeOH) [1]

UV λmaxMeOH nm (log ε): 204 (4.07), 300 (4.12) [1]

FAB-MSm/z: 648 [M], 485 [M-H-162], 385 [1]

HR-FAB-MSm/z: 671.3400 [M + Na]+, 649.3587 [M + H]+, 487.3048 [M + H-C6H10O5]+ [1]

1H NMR (400 MHz, J/Hz, CD3OD): 2.20 (dd, J = 5, 14), 2.37 (t, J = 14, H2-1), 6.48 (m, H-6), 2.27, 2.60 (m, H2-7), 2.12 (d, J = 8, H-8), 3.02 ( brd, J = 14, H-10), 2.56, 3.19 (d, J = 14, H2-12), 1.54 (d, J = 13), 1.92 (dd, J = 9, 13, H2-15), 4.60 (dd, J = 7, 9, H-16), 2.36 (d, J = 7, H-17), 0.97 (s, CH3-18), 1.11 (s, CH3-19), 1.21 (s, CH3-21), ca 3.38 (H-22), ca 1.5, 1.75 (m, H2-23), 2.05, ca 2.77 (m, H2-24), 4.70 (brs, H2-26), 1.72 (s, CH3-27), 2.15 (s, CH3-28), 1.30...

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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