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Gymnemaside I

Reference work entry

CAS Registry Number: 141358-44-3 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Dammarane Type – 19-Oxo-dammar-24-en-3β,20(S)-diol

Biological source: Gymnema sylvestre [1]

C42H70O13: 782.481

Mp: 159–161°C [1]

[α]D + 23.7° (c 3.0, MeOH) [1]

IR (KBr) νmax cm−1 : 3400, 1700, 1635 [1]

FAB-MSm/z: 805 [M + Na]+ [1]

1H NMR (400 MHz, J/Hz, C5D5N): 0.91, 0.97, 1.02, 1.37, 1.48, 1.69, 1.69 (s, CH3 × 7), 3.46 (dd, J = 11.5, 4.0, H-3), 5.30 (m, H-24), 10.31 (s, OHC-19), 4.95 (d, J = 7.5, H-1 of Glc), 5.06 (d, J = 7.5, H-1 of Glc′) [1]

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

Table 1

C-1

33.5

C-11

22.5

C-21

21.7

Glc-1

106.9

Glc′-1

98.6

2

27.7

12

25.5

22

40.3

2

75.7

2

75.6

3

87.7

13

42.4

23

23.3

3

78.7

3

79.1

4

40.1

14

50.5

24

126.1

4

72.0

4

71.9

5

54.7

15

31.9

25

130.8

5

78.4

5

77.9

6

17.7

16

27.9

26

25.9

6

63.0

6

63.2

7

34.7

17

48.4

27

17.9

       

8

40.5

18

16.0

28

26.7

       

9

52.9

19

205.9

29

16.8

       

10

52.8

20

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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