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Ilexoside XLII

Reference work entry

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Ursene Type – 23-Oxorotungenic Acid

Biological source: Ilex rotunda [1]

C36H56O11: 664.382

[α]D22 + 30.8° (c 2.4, MeOH) [1]

FAB-MSm/z: 663 [M-H], 501 [M-H-Glc] [1]

1H NMR (600 MHz, J/Hz, C5D5N): 1.02, 1.18, 1.40, 1.62 (s, CH3 × 4), 1.07 (d, J = 6.6, CH3), 2.42 (dt, J = 14.0, 3.0, Hβ-15), 2.92 (brs, H-18), 3.07 (dt, J = 14, 3, Hα-16), 4.39 (dd, J = 11, 4.5, H-3), 4.48, 4.80 (d, J = 11.7, H2-24), 5.54 (dd, J = 4, 3.4, H-12), 10.3 (s, H-23)

β-D-Glcp: 6.28 (d, J = 8.0, H-1), 4.22 (dd, J = 8.0, 8.8, H-2), 4.31 (t, J = 8.8, H-3), 4.37 (dd, J = 9.0, 8.8, H-4), 4.06 (m, H-5), 4.41 (dd, J = 12, 2.7, H-6) [1]

13 C NMR (125 MHz, C 5D 5N): [ 1]

Table 1

C-1

38.6

C-16

26.1

Glc-1

95.8

2

27.9

17

48.6

2

74.0

3

74.6

18

54.5

3

79.0

4

59.0

19

72.6

4

71.3

5

50.9

20

42.1

5

79.3

6

21.4

21

26.7

6

62.4

7

33.3

22

37.7

   

8

40.7

23

208.8

   

9

47.6

24

61.0

   

10

36.7

25

15.8

   

References

  1. 1.
    K. Amimoto, K. Yoshikawa, S. Arihara, Chem. Pharm. Bull. 41(1), 39 (1993)CrossRefGoogle Scholar

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