Compound 4 from Betula ermanii

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Dammarane Type – 20(S),24(R)-Epoxy-dammar-3β,11α,25-triol

Biological source: Betula ermanii [1]

C40H66O11: 722.460

[α]D + 25° (c 1.0, MeOH) [1]

FAB-MSm/z: 721.452 [M-H] [1]

1H NMR (500 MHz, J/Hz, C5D5N): 0.94, 0.94, 0.95, 0.96, 1.15, 1.17, 1.40, 1.44, (s, CH3 × 8), 1.92 (Ac), 2.16 (s, Ac), 3.32 (dd, J = 11.9, 4.6), 3.96 (t, J = 7.0), 5.00 (d, J = 7.9) [1]

13 C NMR (500 MHz, C 5D 5N): [ 1]

Table 1

C-1

40.5

C-16

26.6

Glc-1

103.9

2

26.8

17

49.8

2

76.2

3

88.6

18

16.8

3

75.8

4

39.9

19

17.0

4

71.8

5

56.1

20

85.9

5

78.5

6

18.3

21

23.5

6

62.6

7

36.1

22

36.1

Ac

170.0

8

41.3

23

26.8

 

169.9

9

53.1

24

84.2

 

21.9

10

38.8

25

71.2

 

21.2

11

73.0

26

26.1

   

12

35.7

27

27.1

   

13

40.9

28

28.1

   

14

50.0

29

16.6

   

15

31.4

30

16.3

   

References

  1. 1.
    H. Fuchino, T. Satoh, N. Tanaka, Chem. Pharm. Bull. 43(11), 1937 (1995)CrossRefGoogle Scholar

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