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Castanopsinin E2

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 + 10.3° (c 0.76, MeOH) [1]

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

1H NMR (100 MHz, J/Hz, C5D5N): 7.22 (s, HHDP-H) [1]

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

Table 1

C-1

47.8

Glc-1

95.6

HHDP-5

137.2

2

67.6

2

74.1

 

137.7

3

77.2

3

78.9

COO-

169.3

4

48.7

4

71.1

 

(2C)

5

57.6

5

78.9

   

6

20.3

6

62.4

   

7

33.5

HHDP-1

115.4

   

8

40.1

 

116.4

   

9

48.6

2

126.5

   

10

38.6

 

128.3

   

12

1256.1

3

107.9

   

13

138.4

 

(2C)

   

23

64.5

4,6

146.2

   

24

65.0

 

(2C)

   

28

176.1

 

146.5

   
     

147.1

   

References

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

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