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Assamsaponin B

Reference work entry

CAS Registry Number: 259748-07-7 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Oleanene Type – Theasapogenol E

Biological source: Camellia sinensis [1]

C61H92O28: 1272.577

[α]D26 + 21.6° (c 0.1, MeOH) [1]

FAB-MS (negative) m/z: 1271 [M-H], 1139 [M-C5H9O4], 1109 [M-C6H11O5], 1007 [M-C10H17O8]

FAB-MS (positive) m/z: 1295 [M + Na]+ [1]

IR (KBr) νmax cm−1: 3432, 1725, 1655, 1078, 1048 [1]

1H NMR (500 MHz, J/Hz, C5D5N): 5.98 (dd-like, H-3), 5.38 (brs, H-12), 5.58 (brs, H-16), 2.98 (dd, J = 4.9, 13.6, H-18), 5.85 (d, J = 10.4, H-21), 6.09 (d, J = 10.4, H-22), 9.93 (s, H-23), 1.46 (s, CH3-24), 0.79 (s, CH3-25), 0.74 (s, CH3-26), 1.44 (s, CH3-27), 3.46 (d, J = 11.0, H2-28), 1.07 (s, CH3-29), 1.26 (s, CH3-30); β-D-GlcUAp: 4.81 (d, J = 7.3, H-1); β-D-Galp: 5.71 (d-like, H-1); α-L-Arap: 5.71 (d-like, H-1); β-D-Xylp: 5.00 (d, J = 7.6, H-1); Angeloyl: 5.90 (dq-like, H-3), 2.06 (d, J = 7.3, CH3-4), 1.98...

References

  1. 1.
    T. Murakami, J. Nakamura, H. Matsuda, M. Yoshikawa, Chem. Pharm. Bull. 47(12), 1759 (1999)CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2013

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