Melilotus-Saponin O2

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Oleanene Type – 22-Oxo-24-hydroxy-olean-12-en-29-oic Acid

Biological source: Melilotus officinalis [1]

C47H72O19: 940.466

[α]D14−45.7° (c 0.50, C5D5N) [1]

FAB-MS: m/z 939 [M-H], 793 [M-H-Rha], 661 [M-H-Rha-Xyl], 485 [M-H-Rha-Xyl-GlcUA] [1]

1H NMR (J/Hz, C5D5N): 0.69, 0.85, 1.19, 1.28, 1.45, 1.46 (s, CH3 × 6), 5.27 (s, H-12)

α-L-Rhap: 6.23 (s, H-1), 4.71 (dd, J = 3.1, 9.2, H-3), 1.82 (d, J = 6.1, CH3-6)

β-D-Xylp: 4.08 (t, J = 8.4, H-3)

β-D-GlcUAp: 4.93 (d, J = 7.9, H-1) [1]

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

Table 1

C-1

38.8

C-16

27.4

GlcUA-1

104.9

2

26.3

17

48.2

2

78.2

3

90.9

18

47.4

3

76.4

4

44.0

19

42.0

4

73.8

5

56.3

20

45.2

5

77.8

6

18.5

21

47.1

6

175.7

7

33.0

22

216.8

Xyl-1

102.4

8

39.7

23

22.7

2

78.9

9

47.5

24

62.8

3

78.0

10

36.4

25

15.5

4

70.6

11

23.9

26

16.7

5

66.5

12

123.2

27

25.4

Rha-1

101.7

13

141.6

28

20.9

2

72.0

14

42.0

29

181.0

3

72.0

15

25.4

30

21.9

References

  1. 1.
    T. Hirakawa, M. Ohkawa, J. Kinjo, T. Nohara, Chem. Pharm. Bull. 48(2), 286 (2000)CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2013

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