Gongganoside G

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Ursene Type – 27-Oxo-ursolic Acid

Biological source: Bhesa paniculata [1]

C54H86O23: 1102.555

[α]D18 + 40.7° (c 0.95 MeOH) [1]

IR (KBr) νmax cm−1: 3420, 2926, 1726, 1706, 1635, 1453, 1075 [1]

FAB-MSm/z: 1125.5463 [M + Na]+; 1101 [M-H], 939, 793, 631, 469 [1]

1H NMR (J/Hz, CD3OD): 0.84 (s, CH3-24), 0.88 (brs, CH3-26, 29), 0.97 (brs, CH3-25, 30), 1.06 (s, CH3-23), 2.28 (d, J = 10.9, H-18), 5.81 (brs, H-12), 9.84 (s, CHO-14)

β-D-Glcp: 4.38 (d, J = 7.7, H-1)

β-D-Glcp′: 5.37 (d, J = 7.9, H-1)

α-L-Rhap: 5.16 (d, J = 1.4, H-1) [1]

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

Table 1

C-1

39.9

C-16

25.2

Glc-1

105.7

Rha-1

102.0

2

27.0

17

49.6

2

78.2

2

72.2

3

91.9

18

54.4

3

78.8

3

72.1

4

40.5

19

37.5

4

72.1

4

74.2

5

56.8

20

40.5

5

77.8

5

69.5

6

19.2

21

31.0

6

62.9

6

18.3

7

36.8

22

37.2

Glc′-1

102.0

Glc″-1

95.6

8

42.1

23

28.6

2

79.6

2

73.9

9

50.4

24

16.9

3

79.3

3

78.2

10

38.2

25

16.9

4

72.6...

References

  1. 1.
    K. Ohashi, T. Tanikawa, Y. Okumura, K. Kawazoe, N. Tatara, M. Minato, H. Shibuya, I. Kitagawa, Chem. Pharm. Bull. 42(9), 1791 (1994)CrossRefGoogle Scholar

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