Castanopsinin G2

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Ursene Type – 2α,3β,23,24-Tetrahydroxy-urs-12-ene-28-oic Acid

Biological source: Castanopsis cuspidata [1]

C57H68O23: 1120.415

[α]D20 + 39.8° (c 0.56, MeOH) [1]

FAB-MSm/z: 1119 (M-H) [1]

1H NMR (100 MHz, J/Hz, C5D5N): 7.15, 7.27 (s, HHDP-H), 7.85 (s, galloyl-H) [1]

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

Table 1

C-1

47.6

Glc-1

95.4

HHDP-5

137.7

2

68.3

2

72.3

 

138.3

3

78.9

3

80.0

COO-

167.5

4

48.6

4

69.0

 

169.8

5

57.4

5

78.9

Galloyl-1

121.7

6

19.9

6

62.6

2,6

110.5

7

33.3

HHDP-1

116.5

3,5

147.4

8

40.0

 

(2C)

4

140.7

9

47.6

2

127.5

   

10

38.2

 

127.6

   

12

125.6

3

107.3

   

13

140.5

 

108.3

   

23

71.5

4,6

146.0

   

24

61.8

 

(2C)

   

28

176.4

 

146.5

   
     

146.7

   

References

  1. 1.
    M. Ageta, G.-I. Nonaka, I. Nishioka, Chem. Pharm. Bull. 36(5), 1646 (1988)CrossRefGoogle Scholar

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