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Gymnemaside VII

Reference work entry

CAS Registry Number: 141380-42-9 Open image in new window

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

Biological source: Gymnema sylvestre [1]

C41H70O15: 802.471

Mp: 185–187°C [1]

[α]D −7.7° (C 1.4, MeOH) [1]

FAB-MSm/z: 826 [M + Na + H]+ [1]

1H NMR (400 MHz, J/Hz, C5D5N): 0.87, 0.99, 1.04, 1.09, 1.26, 1.61, 1.67, 1.62, (s, CH3 × 7), 3.40 (dd, J = 11.5, 4.0, H-3), 6.13 (d, J = 15.5, H-24), 6.20 (ddd, J = 15.5, 8.0, 4.5, H-23), 4.96 (d, J = 7.5, H-1 of Xyl), 5.16 (d, J = 8.0, H-1 of Glc) [1]

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

Table 1

C-1

48.4

C-11

30.6

C-21

23.1

Glc-1

98.2

Xyl-1

105.6

2

68.8

12

70.3

22

38.0

2

75.0

2

74.8

3

83.7

13

49.7

23

126.8

3

79.0

3

78.0

4

40.0

14

51.5

24

140.1

4

71.6

4

71.1

5

56.5

15

31.1

25

81.4

5

76.8

5

67.0

6

18.8

16

26.4

26

25.1

6

70.0

   

7

35.1

17

51.8

27

25.4

       

8

40.2

18

16.1

28

29.2

       

9

50.3

19

17.3

29

17.6

       

10

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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