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Saponin S5

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Oleanene Type – Maslinic Acid

Biological source: Cylicodiscus gabunensis [1]

C46H74O17: 898.492

[α]D20 + 52.3° (c 1.00, EtOH) [1]

IR (KBr) νmax cm−1: 3700–3050, 2925–2880, 1697, 1643, 1480–1384, 1150, 1080, 1000, 809, 760, 635 [1]

FAB-MSm/z: 897 [M-H] (80), 765 [M-H-132] (37), 633 [765-132] (70), 615 (87), 499 (47), 471 [633-162] (100), 435 (68), 437 (50), 423 (30), 409 (23) [1]

1H NMR (250 MHz, J/Hz, C5D5N): 0.82, 0.84, 0.94, 0.94, 0.99, 1.28, 1.31 (s, CH3 × 7), 3.24 (d, J = 8.5, H-3), 3.28 (m, H-18), 5.45 (s, H-12)

α-L-Arap: 5.24 (d, J = 7.5, H-1), 3.65 (d, J = 9.0, H-5)

β-D-Glcp: 4.88 (d, J = 7.5, H-1)

α-L-Arap′: 6.02 (d, J = 3.2, H-1) [1]

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

Table 1

C-1

46.65

C-16

23.66

Glc-1

105.49

2

69.05

17

47.12

2

73.33

3

95.26

18

41.95

3

88.65

4

39.68

19

46.45

4

67.59

5

55.40

20

31.20

5

78.29

6

18.43

21

34.23

6

62.32

7

33.17

22

29.94

Ara-1

References

  1. 1.
    H.P. Tchivounda, B. Koudogbo, Y. Besace, E. Casadevall, Phytochemistry 30, 2711 (1991)CrossRefGoogle Scholar

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