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Vina-Ginsenoside-R2

Reference work entry

CAS Registry Number: 156980-42-6 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Dammarane Type – 20(S),24(R)-Epoxy-dammar-3β,6α,12β,25-tetraol

Biological source: Panax vietnamensis [1]

C43H72O15: 828.487

Mp: 186–189°C (MeOH-H2O) [1]

[α]D25−17.4° (c 0.69, MeOH) [1]

FAB-MSm/z: 827 [M-H]-, 695 [M-H-Xyl]-, 491 [M-H-(Xyl-Ac-Glc)]- [1]

EI-MS (TMSi deriv) m/z: 627 [(Glc-Xyl)AcTMSi5], 607 (697-TMSiOH), 349 [(terminalXyl)TMSi3], 259 (349-TMSiOH) [1]

1H NMR (J/Hz, C5D5N): 0.89, 1.05, 1.28, 1.32, 1.33, 1.42, 1.47, 2.06 (s, CH3 × 8), 2.10 (s, CH3CO)

β-D-Glcp: 5.75 (d, J = 6.4, H-1)

α-L-Xylp: 5.00 (H-1) [1]

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

Table 1

C-1

39.5

C-16

25.8

Glc-1

103.5

2

27.8

17

49.5

2

80.2

3

78.7

18

17.9

3

78.7

4

40.1

19

17.0

4

71.2

5

61.3

20

87.0

5

75.0

6

79.3

21

27.0

6

65.0

7

45.3

22

32.6

Ac

170.8

8

41.1

23

28.6

 

21.0

9

50.2

24

88.4

Xyl-1

105.0

10

39.6

25

70.0

2

75.7

11

32.2

26

26.6

3

78.7

12

70.8

27

28.9

4

71.2...

References

  1. 1.
    M.D. Nguyen, T.N. Nguyen, R. Kasai, A. Ito, K. Yamasaki, O. Tanaka, Chem. Pharm. Bull. 41(11), 2010 (1993)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2013

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