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Compound 2 from Tupidanthus calyptratus

Reference work entry

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Ursene Type – 2α,3β,20β,23-Tetrahydroxy-urs-12-en-28-oic Acid

Biological source: Tupidanthus calyptratus [1]

C46H74O19: 930.482

[α]D25 + 15° (c 1.0, MeOH) [1]

FAB-MSm/z: 929 [M-H], 797 [M-H-162], 635 [M-H-162-132], 503 [M-H-162-2 × 132] [1]

1H NMR (600 MHz, J/Hz, CD3OD): 0.74 (s, CH3-24), 0.83 (s, CH3-25), 0.95 (m, Hb-1), 0.95 (m, Hb-16), 0.96 (d, J = 6.2, H-29), 1.00 (s, CH3-26), 1.09 (s, CH3-30), 1.09 (m, Hb-15), 1.13 (m, Ha-16), 1.20 (s, CH3-27), 1.31 (brd, J = 11.0, H-5), 1.35 (m, Hb-7), 1.38 (m, Hb-6), 1.40 (s, H-19), 1.45 (m, Hb-21), 1.50 (m, Ha-6), 1.51 (m, Ha-21), 1.60 (m, Ha-7), 1.64 (s, H-9), 1.67 (m, Hb-22), 1.75 (m, Ha-22), 1.96 (m, Hb-11), 2.00 (m, Ha-11), 2.07 (m, Ha-15), 2.12 (m, Ha-1), 2.22 (d, J = 13.0, H-18), 3.07 (d, J = 12.0, Hb-23), 3.27 (d, J = 12.0, Ha-23), 3.40 (d, J = 11.0, H-3), 3.69 (ddd, J = 11.0, 9.0, 3.0, H-2), 5.27...

References

  1. 1.
    G. Cioffi, A. Bellino, C. Pizza, F. Venturella, N. De Tommasi, J. Nat. Prod. 64(6), 750 (2001)CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2013

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