Assamsaponin D

Reference work entry

CAS Registry Number: 259748-69-1 Open image in new window

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

Biological source: Camellia sinensis [1]

C59H92O27: 1232.582

Mp: 190.6–191.2° [1]

[α]D26 + 15.6° (c 0.1, MeOH) [1]

FAB-MS (negative) m/z: 1231 [M-H], 1099 [M-C5H9O4], 967 [M-C10H17O8] [1]

FAB-MS (positive) m/z: 1255 [M + Na]+ [1]

IR (KBr) νmax cm−1: 3432, 1719, 1649, 1078, 1046 [1]

1H NMR (500 MHz, J/Hz, C5D5N): 4.12 (m, H-3), 5.35 (brs, H-12), 4.43 (brs, H-16), 3.02 (dd-like, H-18), 6.55 (d, J = 10.1, H-21), 6.15 (d, J = 10.1, H-22), 4.35 (d-like, H2-23), 1.07 (s, CH3-24), 0.91 (s, CH3-25), 0.90 (s, CH3-26), 1.79 (s, CH3-27), 1.06 (s, CH3-29), 1.30 (s, CH3-30), 3.38, 3.62 (d, J = 11.0, H2-28)

β-D-GlcUAp: 5.06 (d, J = 8.2, H-1)

β-D-Galp: 5.83 (d, J = 7.6, H-1)

α-L-Arap: 5.69 (d, J = 6.5, H-1)

β-D-Xylp: 5.01 (d, J = 7.6, H-1)

Angeloyl: 5.98 (dq-like, H-3), 2.09 (d, J = 7.0, CH3-4),...

References

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

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