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Gymnemaside VI

Reference work entry

CAS Registry Number: 141380-41-8 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Dammarane Type – 2α,3β,12β,20(S),25-Pentahydroxy-dammar-23-ene

Biological source: Gymnema sylvestre [1]

C42H72O14: 800.492

Mp: 188–190°C [1]

[α]D −8.7° (c 1.4, MeOH) [1]

FAB-MSm/z: 823 [M + Na]+ [1]

1H NMR (400 MHz, J/Hz, C5D5N): 0.82, 0.99, 1.05, 1.07, 1.25, 1.57, 1.57, 1.57, (s, CH3x7), 3.36 (d, J = 9.0, H-3), 6.07 (d, J = 15.5, H-24), 6.19 (dd, J = 15.5, 8.5, H-23), 5.14 (d, J = 7.5, H-1 of Glc), 5.40 (brs, H-1 of Rha) [1]

13 C NMR (100 MHz, C 5D 5N): [ 1]

Table 1

C-1

48.3

C-11

30.4

C-21

23.0

Glc-1

98.3

Rha-1

101.5

2

68.7

12

70.5

22

39.9

2

73.3

2

72.2

3

83.7

13

49.4

23

122.7

3

79.0

3

72.9

4

39.9

14

51.5

24

142.4

4

71.3

4

74.5

5

56.5

15

30.8

25

69.9

5

76.7

5

69.3

6

18.8

16

26.4

26

30.6

6

66.6

6

18.7

7

35.0

17

52.0

27

30.7

       

8

40.1

18

16.1

28

29.2

       

9

50.3

19

17.2

29

17.6

       

10

38.6

20

83.3

30

17.5

       

References

  1. 1.
    K. Yoshikawa, S. Arihara, K. Matsuura, T. Miyase, Phytochemistry 31(1), 237 (1992)CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2013

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