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Ginsenoside-Rb2

Reference work entry

CAS Registry Number: 11021-13-9 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Dammarane Type – 20(S)-Protopanaxadiol

Biological source: Panax ginseng [1, 2], P. notoginseng [3], P. quinquefolium [4, 5], P. vietnamensis [6]

C53H90O22: 1078.592

Mp: 200–203°C [2]

[α]D20 + 16° (MeOH) [1], [α]D22 + 16.1° (c 0.92, MeOH) [5]

IR (KBr) νmax cm−1: 3420, 1620 [2]

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

Table 1

C-1

39.4

C-16

26.4

Glc-1

105.0

Glc″-1

97.9

2

26.6

17

51.6

2

83.0

2

74.8

3

89.1

18

16.2

3

78.1

3

78.7

4

39.6

19

15.9

4

71.5

4

71.5

5

56.4

20

83.5

5

78.1

5

76.6

6

18.3

21

22.2

6

62.7

6

69.0

7

35.1

22

36.3

Glc′-1

105.7

Ara-1

104.5

8

39.9

23

23.1

2

76.9

2

72.0

9

50.1

24

125.8

3

79.0

3

73.9

10

36.8

25

131.0

4

71.5

4

68.5

11

30.7

26

25.8

5

78.7

5

65.5

12

70.1

27

17.9

6

62.7

   

13

49.4

28

28.0

       

14

51.3

29

16.5

       

15

30.7

30

17.3

       

References

  1. 1.
    R. Kasai, H. Besso, O. Tanaka, Y. Saruwatari, T. Fuwa, Chem. Pharm. Bull. 31(6), 2120 (1983)CrossRefGoogle Scholar
  2. 2.
    S. Sanada, N. Kondo, J. Shoji, O. Tanaka, S. Shibata, Chem. Pharm. Bull. 22, 421 (1974)CrossRefGoogle Scholar
  3. 3.
    S. Taniyasu, O. Tanaka, T.-R. Yang, J. Zhou, Planta Med. 44(2), 124 (1982)CrossRefGoogle Scholar
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    H. Besso, R. Kasai, I. Wei, I.-F. Wang, Y. Saruwatari, T. Fuwa, O. Tanaka, Chem. Pharm. Bull. 30(12), 4534 (1982)CrossRefGoogle Scholar
  5. 5.
    N.M. Duc, N.T. Nham, R. Kasai, A. Ito, K. Yamasaki, O. Tanaka, Chem. Pharm. Bull. 41(11), 2010 (1993)CrossRefGoogle Scholar
  6. 6.
    S.E. Chen, E.J. Staba, S. Taniyasu, R. Kasai, O. Tanaka, Planta Med. 42(8), 406 (1981)CrossRefGoogle Scholar

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