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Assamsaponin A

Reference work entry

CAS Registry Number: 259747-95-0 Open image in new window

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

Biological source: Camellia sinensis [1]

C57H88O25: 1172.551

Mp: 211.7–212.2°C (CHCl3-MeOH) [1]

[α]D26 −19.6° (c 0.1, MeOH) [1]

FAB-MS (negative) m/z: 1171 [M-H], 1039 [M-C5H9O4], 907 [M-C10H17O8] [1]

FAB-MS (positive) m/z: 1195 [M + Na]+ [1]

IR (KBr) νmax cm−1: 3432, 1721, 1655, 1078, 1048 [1]

1H NMR (500 MHz, J/Hz, C5D5N): 0.82 (s, CH3-25), 0.85 (s, CH3-26), 1.04 (s, CH3-29), 1.27 (s, CH3-30), 1.43 (s, CH3-24), 1.80 (s, CH3-27), 3.00 (m, H-18), 3.15, 3.66 (d-like, CH2-28), 4.0 (m, H-3), 4.59 (brs, H-16), 5.37 (brs, H-12), 6.12 (dd, like, H-22), 9.85 (s, CHO-23)

β-D-GlcUAp: 4.82 (d, J = 7.3, H-1)

β-D-Galp: 5.68 (d, J = 7.3, H-1)

α-L-Arap: 5.65 (d, J = 5.2, H-1)

β-D-Xylp: 4.98 (d, J = 7.2, H-1)

Angelic acid: 6.00 (dq-like, H-3), 2.08 (d, J = 6.9, CH3-4), 1.96 (s, CH3-5) [1]

13 C NMR (C 5D

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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