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Betulamaximoside B

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Dammarane Type – 20(S),24(R)-Epoxy-dammar-3α,12β,17α,25-tetraol

Biological source: Betula maximowicziana [1]

C40H66O12: 738.455

[α]D−22° (c 1.0, MeOH) [1]

FAB-MS (negative ion mode) m/z: 737.448 (M-H) [1]

1H NMR (J/Hz, C5D5N): 0.88, 0.92, 1.01, 1.03, 1.27, 1.29, 1.39, 1.50 (s, CH3 × 8), 2.02, 2.04 (s, AcO × 2), 3.58 (brs), 3.93 (dd, J = 8.1, 5.8), 4.04 (d, J = 8.9), 4.19 (t, J = 8.9), 4.75 (d, J = 7.6), 4.81 (dd, J = 11.6, 6.1), 4.95 (dd, J = 11.6, 1.8), 5.42 (td, J = 11.0, 5.2) [1]

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

Table 1

C-1

34.1

C-17

84.7

Glc-1

103.1

2

22.3

18

15.8

2

74.8

3

83.2

19

16.4

3

78.6

4

37.5

20

91.1

4

71.6

5

50.8

21

23.8

5

75.0

6

18.4

22

33.9

6

64.7

7

34.2

23

27.4

Ac-1

170.8

8

40.4

24

84.3

2

20.8

9

50.0

25

72.1

   

10

37.4

26

27.8

   

11

29.0

27

26.8

   

12

72.1

28

29.4

   

13

49.0

29

22.7

   

14

52.2

30

18.3

   

15

33.4

Ac-1

170.2

   

16

39.5

2

21.8

 

References

  1. 1.
    H. Fuchino, T. Satoh, N. Tanaka, Chem. Pharm. Bull. 44(9), 1748 (1996)CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2013

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