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Castanopsinin A2

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]

C50H64O19: 968.404

[α]D20 + 75.9° (c 0.45, MeOH) [1]

FAB-MSm/z: 967 (M-H)[1]

1H NMR (100 MHz, J/Hz, C5D5N): 7.18, 7.28 (s, HHDP-H) [1]

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

Table 1

C-1

46.2

Glc-1

95.7

HHDP-5

137.7

2

68.3

2

74.1

 

(2C)

3

78.8

3

78.8

COO-

169.4

4

48.8

4

71.2

 

169.0

5

57.3

5

79.1

   

6

20.0

6

62.2

   

7

33.8

HHDP-1

116.3

   

8

40.2

 

(2C)

   

9

47.6

2

127.5

   

10

38.1

 

127.6

   

12

125.7

3

107.3

   

13

138.5

 

108.4

   

23

71.3

4,6

146.0

   

24

62.2

 

(2C)

   

28

176.2

 

146.4

   
     

146.6

   

References

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

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