Betulamaximoside A

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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]

C38H64O11: 696.444

[α]D−19° (c 1.0, MeOH) [1]

FAB-MS (negative ion mode) m/z: 695.438 (M-H) [1]

1H NMR (J/Hz, C5D5N): 0.86, 0.87, 1.01, 1.03, 1.24, 1.29, 1.39, 1.50 (s, CH3 × 8), 2.04 (s, OAc), 3.63 (brs), 3.93 (dd, J = 8.1, 5.8)

β-D-Glcp: 4.82 (d, J = 7.6, H-1) [1]

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

Table 1

C-1

34.1

C-17

84.7

Glc-1

102.8

2

21.9

18

15.8

2

75.0

3

82.6

19

16.4

3

78.9

4

37.5

20

91.1

4

71.7

5

50.7

21

23.8

5

78.2

6

18.4

22

33.9

6

63.2

7

34.2

23

27.4

   

8

40.4

24

84.2

   

9

50.0

25

72.1

   

10

37.4

26

27.8

   

11

29.0

27

26.8

   

12

72.1

28

29.5

   

13

49.0

29

22.6

   

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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