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Ilexsaponin B2

Reference work entry

CAS Registry Number: 108906-69-0 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Ursene Type – Pomolic Acid

Biological source: Ilex pubescens [1]

C47H76O17: 912.508

Mp: 240–243°C (EtOH) [1]

[α]D20−15.3° (c 1.20, C5H5N) [1]

IR (nujol) νmax cm−1: 3300, 1685 [1]

1H NMR (100 MHz, J/Hz, C5D5N): 0.86, 1.08, 1.12 (d, J = 9.0), 1.35, 1.35, 1.43, 1.76, (CH3 × 7), 3.30 (s, H-18), 5.08 (s, HO-19), 5.56 (brt, H-12)

β-D-Xylp: 4.91 (d, J = 5.4, H-1); β-D-Glcp: 5.83 (d, J = 7.1, H-1); α-L-Rhap: 6.41 (brs, H-1), 1.79 (d, J = 6.1, CH3-6) [1]

13 C NMR (25.15 MHz, C 5D 5N): [ 1]

Table 1

C-1

38.8

C-17

47.9

Xyl-1

105.9

2

27.0

18

47.4

2

79.0

3

89.7

19

73.4

3

77.8

4

39.7

20

43.0

4

71.3

5

56.0

21

23.9

5

66.6

6

18.6

22

32.5

Glc-1

102.3

7

33.5

23

28.4

2

79.4

8

40.2

24

15.4

3

79.0

9

47.7

25

16.1

4

72.3

10

37.0

26

17.3

5

78.5

11

24.9

27

24.4

6

63.3

12

127.3

28

180.7

Rha-1

102.0

13

139.5

29

29.8

2

72.6

14

42.1

30

16.7

3

72.6

15

29.2

References

  1. 1.
    K. Hidaka, M. Ito, Y. Matsuda, H. Kohda, K. Yamasaki, J. Yamahara, T. Chisaka, Y. Kawakami, T. Sato, K. Kagei, Chem. Pharm. Bull. 35(2), 524 (1987)CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2013

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