Cayaponoside C2

Reference work entry

CAS Registry Number: 151703-10-5 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Cucurbitane Type – 22,23,24,25,26,27,29-Heptanor-1,2,3,4,5,10-hexadehydro-cucurbitacin

Biological source: Cayaponia tayuya [1]

C29H40O10: 548.262

Mp: 164–170°C [1]

[α]D24 + 47.5° (c 1.33, MeOH) [1]

UV λmaxMeOH nm (log ε): 206 (4.30), 220 (shoulder, 3.91), 280 (3.16) [1]

FAB-MSm/z: 547 [M-H], 385[M-H-162] [1]

HR-FAB-MSm/z: 571.2519 [M + Na]+, 386.2087 [M-C6H10O5]+ [1]

1H NMR (J/Hz): 6.66 (s, H-1), 2.66 (ddd, J = 1, 10, 18), 2.85 (dd, J = 10, 18, H2-6), ca 1.96, 2.28 (m, H2-7), 2.13 (brd, J = 7, H-8), 2.48, 2.98 (d, J = 14, H2-12), 1.59 (dd, J = 1, 13, H-15), 1.99 (dd, J = 8, 13, H-15), 4.83 (ddd, J = 1, 7, 9, H-16), 3.14 (d, J = 7, H-17), 0.69 (s, CH3-18), 1.31 (s, CH3-19), 2.14 (s, CH3-21), 2.09 (s, CH3-28), 1.02 (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, 12,...

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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