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Assamsaponin E

Reference work entry

CAS Registry Number: 259748-74-8 Open image in new window

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

Biological source: Camellia sinensis [1]

C59H92O26: 1216.587

Mp: 189.4–190.4°C [1]

[α]D27 + 23.8° (c 0.1, MeOH) [1]

FAB-MS (negative) m/z: 1215 [M-H], 1083 [M-C5H O4],1053 [M-C6H11O5], 951 [M-C10H17O8] [1]

FAB-MS (positive) m/z: 1239 [M + Na]+ [1]

IR (KBr) νmax cm−1: 3453, 1718, 1649, 1080, 1048 [1]

1H NMR (500 MHz, J/Hz, C5D5N): 3.29 (dd, J = 4.6, 11.9, H-3), 5.45 (brs, H-12), 4.72 (brs, H-16), 2.80 (dd-like, H-18), 6.43 (d, J = 10.1, H-21), 4.44 (d-like, H-22), 1.30 (s, CH3-23), 1.12 (s, CH3-24), 0.84 (s, CH3-25), 0.87 (s, CH3-26), 1.81 (s, CH3-27), 4.25 (m, H2-28), 1.10 (s, CH3-29), 1.30 (s, CH3-30)

β-D-GlcUAp: 4.94 (d, J = 7.4, H-1)

β-D-Galp: 5.74 (d, J = 7.6, H-1)

α-L-Arap: 5.73 (d, J = 6.0, H-1)

β-D-Xylp: 5.02 (d, J = 7.6, H-1)

Angelicacid: 5.90 (dq-like, H-3), 2.05 (d, J = 7.0,...

References

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

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© Springer Science+Business Media New York 2013

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