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Saponin 2

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Oleanene Type – 24-Deoxy-oxytrogenin

Biological source: Abrus cantoniensis [1], Dalbergia hupeana [2]

C48H76O19: 956.498

[α]D28−16.6° (c 0.41, C5H5N) [1]

FAB-MSm/z: 955 [M-H], 809 [M-H-Rha], 647 [M-H-Rha-Gal], 471 [647-GlcUA]

1H NMR (400 MHz, J/Hz, C5D5N): 0.87, 0.96, 1.22, 1.22, 1.24, 1.34, 1.34 (s, CH3 × 6), 5.32 (s, H-12)

α-L-Rhap: 6.12 (s, H-1), 1.72 (d, J = 5.5, CH3-6)

β-D-Galp: 5.49 (d, J = 7.4, H-1) [1]

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

Table 1

C-1

38.7

C-16

28.8

GlcUA-1

105.2

Rha-1

102.6

2

26.4

17

37.9

2

79.1

2

72.3

3

89.8

18

44.5

3

76.6

3

72.6

4

39.6

19

41.4

4

73.4

4

74.3

5

55.7

20

42.5

5

77.4

5

69.4

6

18.4

21

37.6

6

172.6

6

18.9

7

33.1

22

75.3

Gal-1

102.0

   

8

39.9

23

28.3

2

78.7

   

9

47.8

24

16.8

3

76.1

   

10

36.8

25

15.6

4

70.4

   

11

23.7

26

17.1

5

76.2

   

12

122.7

27

25.4

6

61.8

   

13

144.2

28

20.9

       

14

42.3

29

181.4

       

15

26.3

30

24.8...

References

  1. 1.
    H. Miyao, Y. Sakai, T. Takeshita, J. Kinjo, T. Nohara, Chem. Pharm. Bull. 44(6), 1222 (1996)CrossRefGoogle Scholar
  2. 2.
    S. Yahara, S. Emura, H. Feng, T. Nohara, Chem. Pharm. Bull. 37(8), 2136 (1989)CrossRefGoogle Scholar

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