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Cayaponoside A1

Reference work entry

CAS Registry Number: 151466-41-0 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Cucurbitane Type – 20(R),29-Nor-isocucurbitacin R-3-ene

Biological source: Cayaponia tayuya [1]

C37H54O13: 706.356

Mp: 148–155°C [1]

[α]D26 + 19.5° (c 1.19, MeOH) [1]

UV λmaxMeOH nm (log ε): 206 (4.35), 300 (4.12) [1]

FAB-MSm/z: 705 [M-H], 543 [M-H-162], 483 [M-H-162-AcOH], 385 [1]

HR-FAB-MSm/z: 729.3466 [M + Na]+, 669.325 [M + Na-AcOH]+ [1]

1H NMR (400 MHz, J/Hz): 2.22 (dd, J = 4, 15), 2.38 (dd, J = 14, 15, H2-1), 6.48 (m, H-6), 2.28 (ddd, J = 2, 6, 20), ca 2.6 (H2-7), 2.10 (d, J = 8, H-8), 3.02 ( brd, J = 14, H-10), 2.57, 3.27 (d, J = 15, H2-12), ca 1.43, 1.87 (dd, J = 9, 13, H2-15), 4.44 (dd, J = 7, 9, H-16), 2.53 (d, J = 7, H-17), 0.92 (s, CH3-18), 1.11 (s, CH3-19), 1.37 (s, CH3-21), 2.69, 2.84 (ddd, J = 6, 10, 18, H2-23), ca 2.0 (m, H2-24), 1.44 (s, CH3-26), 1.44 (s, CH3-27), 2.14 (s, CH3-28), 1.30 (s, CH3-30),...

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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