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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Miscellaneous Glycosides – Cylicodiscis Acid

Biological source: Cylicodiscus gabunensis [1]

C41H66O13: 766.450

[α]D20 + 17° (c 1.2, EtOH) [1]

IR (KBr) νmax cm−1: 3783-3100, 3070, 2944, 2890, 1701, 1643, 1458, 1384, 1160, 1080, 885, 781, 638 [1]

FAB-MSm/z: 765 [M-H] (19), 633 [765-132] (8), 615 [633-18] (7), 471 [633-162] (11), 291 (4), 275 (18), 219 (4), 183 [Glc-H] (100) [1]

1H NMR (250 MHz, J/Hz, C5D5N): 0.86, 0.94, 0.98, 1.10, 1.18, 1.75 (s, CH3 × 6), 2.45 (dd, H-2), 2.8 (dd, H-16), 2.95 (m, H-13 or H-1) 3.30 (dd, H-3), 3.60 (m, H-19), 4.50 (d, J = 9.0, H2-27), 4.73 (s, H-29), 4.92 (s, H-29)

α-L-Arap: 5.21 (d, J = 7.2, H-1), 3.75 (d, J = 10.0, H-5), 3.9-4.3 (H-2, 3, 4, 5)

β-D-Glcp: 4.82 (d, J = 7.8, H-1), 3.9–4.3 (H-2, 3, 4, 6), 4.45 (m, H-5, 6) [1]

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

Table 1

C-1

39.71

C-16

34.10

Glc-1

106.16

2

24.27

17

56.70

2

74.49

3

87.36

18

50.23

3

89.10

4

39.39

19

References

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

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