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Gongganoside B

Reference work entry

CAS Registry Number: 161161-64-4 Open image in new window

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

Biological source: Bhesa paniculata [1]

C42H66O14: 794.445

[α]D + 31.6° (c 1.13, MeOH) [1]

IR (KBr) νmax cm−1: 3430, 1730, 1684, 1638, 1458, 1055 [1]

FAB-MSm/z: 793 [M-H], 631, 587, 441 [1]

1H NMR (J/Hz, CD3OD): 0.78 (CH3-24), 0.88 (CH3-26), 0.91 (CH3-23, 29, 30), 0.97 (CH3-25), 2.28 (d, J = 10, H-18), 3.05 (dd, J = 4.5, 10.9, H-3), 5.62 (brs, H-12)

α-L-Rhap: 4.70 (d, J = 1.1, H-1), 1.22 (d, J = 6.2, CH3-6)

β-D-Glcp: 5.37 (d, J = 8, H-1) [1]

13 C NMR (CD 3OD): [ 1]

Table 1

C-1

39.8

C-16

26.4

Rha-1

104.4

2

26.6

17

49.8

2

72.5

3

90.3

18

55.3

3

72.5

4

40.0

19

40.2

4

74.1

5

56.6

20

38.2

5

69.9

6

19.4

21

31.1

6

17.8

7

37.0

22

38.0

Glc-1

95.6

8

40.8

23

28.7

2

73.9

9

48.0

24

17.0

3

78.2

10

37.9

25

16.9

4

71.1

11

23.9

26

19.2

5

78.6

12

130.9

27

179.1

6

62.5

13

133.2

28

177.9

   

14

57.2

29

18.1

   

15

25.8...

References

  1. 1.
    K. Ohashi, H. Kojima, T. Tanikawa, Y. Okumura, K. Kawazoe, N. Tatara, H. Shibuya, I. Kitagawa, Chem. Pharm. Bull. 42(8), 1596 (1994)CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2013

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