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Assamsaponin H

Reference work entry

CAS Registry Number: 316157-17-2 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]

C60H92O28: 1260.577

Mp: 206.3–207.6°C [1]

[α]D26 + 41.0° (c 0.1, MeOH) [1]

IR (KBr) νmax cm−1: 3432, 1719, 1655, 1078 [1]

FAB-MS (negative ion mode) m/z: 1259 (M-H), 1097 (M-C6H11O5), 965 (M-C11H19O9) [1]

FAB-MS (positive ion mode) m/z: 1283 (M + Na)+ [1]

1H NMR ( 500 MHz, J/Hz, C5D5N): 0.83, 0.95, 1.11, 1.29, 1.44, 1.76, 1.98, 1.99 (s, CH3-25, 26, 29, 30, 24, 27, Ang-5, Ac-2), 2.04 (d, J = 7.4, CH3-4 of Ang), 2.81 (dd-like, H-18), 4.04 (dd, J = 4.6, 11.6, H-3), 4.21 (m, H2-28), 4.44 (d-like, H-22), 4.69 (brs, H-16), 5.43 (brs, H-12), 5.90 (dq-like, H-3 of Ang), 6.42 (d, J = 10.2, H-21), 9.90 (s, H-23)

β-D-GlcUAp: 4.85 (d, J = 7.3, H-1)

β-D-Galp: 5.62 (d, J = 7.6, H-1)

β-D-Glcp: 5.09 (d, J = 7.3, H-1)

α-L-Arap: 5.77 (d, J = 5.3, H-1) [1]

13 C NMR...

References

  1. 1.
    T. Murakami, J. Nakamura, T. Kageura, H. Matsuda, M. Yoshikawa, Chem. Pharm. Bull. 48(11), 1720 (2000)CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2013

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