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Castanopsinin B2

Reference work entry

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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]D18 + 99.0° (c 0.60, MeOH) [1]

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

1H NMR (100 MHz, J/Hz, C5D5N): 7.08, 7.54 (s, HHDP-H), 8.01 (s, galloyl-H) [1]

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

Table 1

C-1

48.4

Glc-1

95.9

HHDP-5

137.8

2

66.6

2

74.1

 

(2C)

3

78.9

3

79.3

COO-

169.7

4

48.6

4

71.0

 

169.4

5

57.4

5

78.8

Galloyl-1

121.3

6

19.9

6

62.1

2,6

111.9

7

33.0

HHDP-1

116.7

3,5

146.7

8

39.7

 

(2C)

4

141.6

9

47.6

2

126.9

COO-

167.5

10

38.1

 

127.4

   

12

125.6

3

107.5

   

13

138.7

 

108.6

   

23

69.8

4,6

145.9

   

24

61.8

 

(2C)

   

28

176.3

 

146.4

   
     

146.8

   

References

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

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© Springer Science+Business Media New York 2013

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