Assamsaponin G

Reference work entry

CAS Registry Number: 316157-16-1 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: 187.7–188.5°C [1]

[α]D26 + 14.9° (c 0.1, MeOH) [1]

IR (KBr) νmax cm−1: 3454, 1719, 1655, 1076 [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): 0.82, 0.84, 1.08, 1.30, 1.44, 1.77, 1.94, 2.02 (s, CH3-25, 26, 29, 30, 24, 27, Ac-2, Ang-5), 2.07 (d, J = 5.6, CH3-4 of Ang), 3.03 (dd-like, H-18), 3.37, 3.59 (both d-like, H2-28), 4.02 (m, H-3), 4.43 (brs, H-16), 5.39 (brs, H-12), 6.00 (dq-like, H-3 of Ang), 6.14 (d, J = 10.4, H-22), 6.56 (d, J = 10.4, H-21), 9.90 (s, H-23); β-D-GlcUAp: 4.86 (d, J = 7.3, H-1); β-D-Galp: 5.61 (d-like, H-1); β-D-Glcp: 5.10 (d, J = 7.0, H-1); α-L-Arap: 5.75 (d, J = 5.2, H-1) [1]

13 C...

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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