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Cynarasaponin I

Reference work entry

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Oleanene Type – 21β-Hydroxy-oleanolic Acid

Biological source: Cynara cardunculus [1]

C43H68O14: 808.460

[α]D25 + 21.0° (c 0.9, MeOH) [1]

1H NMR (89.55 MHz, J/z, C5D5N): 5.46 (brs, H-12), 3.67 (s, COOCH3-28)

β-D-GlcUAp: (overlapped H-1), 3.72 (s, COOMe)

α-L-Arap: 5.18 (d, J = 7.0, H-1) [1]

13 C NMR (22.5 MHz, C 5D 5N) (di-Me ester): [ 1]

Table 1

C-1

38.8

C-16

25.0

GlcUA-1

105.4

2

26.7

17

48.9

2

83.4

3

89.3

18

41,6

3

76.8

4

39.6

19

47,1

4

73.8

5

55.9

20

37,0

5

77.4

6

18.5

21

72.2

6

170.5

7

33.2

22

41.4

Me

52.1

8

39.7

23

28.0

Ara-1

106.8

9

48.0

24

15.5

2

72.9

10

36.8

25

16.5

3

74.3

11

23.8

26

17.2

4

69.2

12

123.3

27

26,1

5

67.1

13

143.5

28

177.2

   

14

42.1

29

29,8

   

15

28.3

30

17.5

   
   

COOMe

51.7

   

References

  1. 1.
    S. Shimizu, N. Ishihara, K. Umehara, T. Miyase, A. Ueno, Chem. Pharm. Bull. 36(7), 2466 (1988)CrossRefGoogle Scholar

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