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Stelmatotriterpenoside H

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Ursene Type – 2α,3β,19α-Trihydroxy-urs-12-en-24,28-dioic Acid

Biological source: Stelmacrypton khasianum [1]

C42H66O17: 842.430

Mp: 219–221°C [1]

[α]D25 + 200.0° (c 0.02, MeOH) [1]

TOF-MSm/z: 1013.8 [M + K]+, 997.8 [M + Na]+ [1]

1H NMR (500 MHz, J/Hz, C5D5N): 1.05 (d, J = 6.0, CH3-30), 1.23 (s, CH3-26), 1.34 (s, CH3-25), 1.37 (s, CH3-29), 1.65 (s, CH3-27), 1.81 (s, CH3-23), 2.90 (s, H-18), 3.44 (d, J = 9.5, H-3), 4.89 (H-2), 5.50 (t-like, H-12)

β-D-Glcp: 6.33 (d, J = 7.8, H-1), 4.19 (H-2), 4.24 (H-3), 4.29 (H-4), 4.03 (H-5), 4.28, 4.29 (H2-6)

β-D-Glcp′: 6.24 (d, J = 8.0, H-1), 4.21 (H-2), 4.27 (H-3), 4.24 (H-4), 4.01 (H-5), 4.39, 4.47 (H2-6) [1]

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

Table 1

C-1

48.70

C-16

26.33

Glc-1

95.96

2

68.17

17

48.80

2

75.17

3

84.22

18

54.48

3

78.88

4

51.04

19

72.72

4

71.48

5

57.51

20

42.12

5

79.18

6

20.91

21

26.74

6

62.63

7

33.81

22

37.62...

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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