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Assamsaponin C

Reference work entry

CAS Registry Number: 259748-14-6 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]

C59H90O27: 1230.556

Mp: 201–202°C (CHCl3–MeOH) [1]

[α]D28 + 21° (c 0.1, MeOH) [1]

FAB-MS (negative) m/z: 1229 [M-H], 1097 [M-C5H9O4], 965 [M-C10H17O8] [1]

FAB-MS (positive) m/z: 1253 [M + Na]+ [1]

IR (KBr) νmax cm−1: 3453, 1721, 1656, 1078, 1048 [1]

1H NMR (500 MHz, J/Hz, C5D5N): 4.00 (dd-like, H-3), 5.44 (brs, H-12), 4.70 (brs, H-16), 2.82 (brs, H-18), 6.38 (d, J = 9.6, H-21), 4.46 (d-like, H-22), 9.88 (s, H-23), 1.44 (s, CH3-24), 0.83 (s, CH3-25), 0.95 (s, CH3-26), 1.76 (s, CH3-27), 4.25 (m, H2-28), 1.09 (s, CH3-29), 1.31 (s, CH3-30)

β-D-GlcUAp: 4.83 (d, J = 6.9, H-1)

β-D-Galp: 5.68 (H-1)

α-L-Arap: 5.65 (d-like, H-1)

β-D-Xylp: 4.99 (d, J = 6.9, H-1)

Tigloyl: 7.00 (dq-like, H-3), 1.61 (d, J = 6.3, CH3-4), 1.86 (s, CH3-5); Ac: 2.02 (CH3) [1]

13 C...

References

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

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