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Kizuta-Saponin K7a

Reference work entry

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Dammarane Type – 3-Oxo-20(S)-dammar-24-ene-6α,20,21,26-tetraol

Biological source: Hedera rhombea [1]

C36H60O10: 652.418

Mp: 181–185°C (dil. MeOH) [1]

[α]D20 + 79.5° (c 1.00, MeOH) [1]

IR (KBr) νmax cm−1: 3400, 1690, 1100–1000 [1]

1H NMR (100 MHz, J/Hz, C5D5N): 1.00 (s, CH3-18), 1.02 (s, CH3-19), 5.73 (brs, H-24), 1.81 (s, CH3-27), 0.77 (s, CH3-28), 1.66 (s, CH3-29), 1.66 (s, CH3-30)

β-D-Glcp: 4.86 (d, J = 7.1, H-1) [1]

13 C NMR (25 MHz, C 5D 5N): [ 1]

Table 1

C-1

40.1

C-16

28.0

Glc-1

103.5

2

33.4

17

46.1

2

75.2

3

219.1

18

17.8

3

78.6

4

47.7

19

16.0

4

72.0

5

59.2

20

76.6

5

78.4

6

66.8

21

66.8

6

62.8

7

45.8

22

36.2

   

8

41.2

23

22.9

   

9

49.6

24

129.5

   

10

38.2

25

132.2

   

11

22.8

26

75.2

   

12

24.7

27

14.3

   

13

41.5

28

32.2

   

14

50.4

29

19.9

   

15

31.7

30

16.6

   

References

  1. 1.
    H. Kizu, M. Koshijima, T. Tomimori, Chem. Pharm. Bull. 33(8), 3176 (1985)CrossRefGoogle Scholar

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