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Stelmatotriterpenoside E

Reference work entry

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Oleanene Type – 23-Hydroxy-longispinogenin

Biological source: Stelmacrypton khasianum [1]

C48H78O20: 974.508

Mp: 226–229°C (dec) [1]

[α]D25 − 43.5° (c 0.18, MeOH) [1]

HR-SI-MSm/z: 973.5006 [M-H]+, 649.3939 [M-2Glc] [1]

1H NMR (500 MHz, J/Hz, C5D5N): 0.82 (s, CH3-29), 0.83 (s, CH3-30), 0.99 (s, CH3-24), 1.02 (s, CH3-25), 1.10 (s, CH3-26), 1.12 (s, CH3-27), 3.14 (dd, J = 12.5, 3.0, H-18), 3.67 (d, J = 10.0), 4.54 (H2-23), 4.23 (H-2), 4.25 (H-3), 5.36 (t-like, H-12)

β-D-Glcp: 5.16 (d, J = 7.0, H-1), 4.10 (H-2), 4.24 (H-3), 4.21 (H-4), 3.90 (H-5), 4.32 (H-6), 4.50 (H-6)

β-D-Glcp′: 6.25 (d, J = 8.0, H-1), 4.10 (H-2), 4.21 (H-3), 4.34 (H-4), 4.10 (H-5), 4.36 (H-6), 4.71 (H-6)

β-D-Glcp″: 5.02 (d, J = 8.0, H-1), 4.00 (t, J = 8.0, H-2), 4.21 (H-3), 4.10 (H-4), 3.87 (H-5), 4.36 (H-6), 4.48 (H-6) [1]

13 C NMR (125 MHz, C 5D 5N): [ 1]

Table 1

C-1

46.93

C-16

23.86

Glc-1...

References

  1. 1.
    Q. Zhang, Y. Zhao, B. Wang, G. Tu, Chem. Pharm. Bull. 51(5), 574 (2003)CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2013

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