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Jegosaponin B

Reference work entry

CAS Registry Number: 290809-68-6 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Oleanene Type – Barringtogenol C

Biological source: Styrax japonica [1]

C61H96O27: 1260.613

Mp: 218–220°C [1]

[α]D25−8.2°(c 1.1, MeOH) [1]

IR (film) νmax cm−1: 3400, 1730, 1665, 1240, 1160 [1]

FAB-MSm/z: 1259 [M-H] [1]

1H NMR (600 MHz, J/Hz, C5D5N): 3.22 (dd, J = 11.5, 4.0, H-3), 5.46 (m, H-12), 4.76 (m, H-16), 2.86 (dd, J = 13.0, 4.5, H-18), 6.43 (d, J = 10.0, H-21), 4.51 (d, J = 10.0, H-22), 1.15 (s, CH3-23), 1.06 (s, CH3 -24), 0.79 (s, CH3-25), 0.97 (s, CH3-26), 1.82 (s, CH3-27), 4.21, 4.32 (d, J = 11.8, H2-28), 1.10 (s, CH3-29), 1.31 (s, CH3-30); β-D-GlcUAp: 4.85 (d, J = 7.1, H-1), 4.75 (dd, J = 8.8, 7.1, H-2), 4.75 (dd, J = 9.1, 8.8, H-3); β-D-Galp: 6.21 (d, J = 7.0, H-1), 4.74 (dd, J = 8.5, 7.0, H-2); α-L-Rhap: 6.22 (brs, H-1), 1.40 (d, J = 6.0, CH3-6); β-D-Glcp: 5.92 (d, J = 7.0, H-1); Tigloyl: 7.02 (q, J =...

References

  1. 1.
    K. Yoshikawa, H. Hirai, M. Tanaka, S. Arihara, Chem. Pharm. Bull. 48(7), 1093 (2000)CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2013

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