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Ilexoside B methyl ester

Reference work entry

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Ursene Type – Pomolic Acid

Biological source: Ilex chinensis [1]

C35H58O8: 606.413

Mp: 155–158°C (MeOH) [1]

[α]D19 + 15.9° (c 0.15, MeOH) [1]

IR (KBr) νmax cm−1: 1720, 1200, 1145, 1030 [1]

EI-MSm/z: 618 (M+, 2 ), 600 (M+-H2O, 2), 559 (3), 486 (M+-132, 12), 468 (M+-132-H2O, 27), 278 (25), 201 (26), 179 (100) [1]

FD-MSm/z: 619 (M++H, 100 ), 618 (M+, 26) [1]

1H NMR (400 MHz, J/Hz, C5D5N): 0.88, 0.93, 1.03, 1.34, 1.40, 1.71 (s, CH3 × 6), 3.37 (dd, J = 11.3, 4.3, Hα-3), 5.50 (m, H-12), 2.86 (s, Hβ-18), 5.25 (s, HO-19), 3.74 (s, COOCH3), 1.10 (d, J = 6.7, CH3-30)

β-D-Xylp: 4.86 (d, J = 7.6, H-1), 4.05 (dd, J = 8.5, 7.6, H-2), 4.20 (t, J = 8.5, H-3), 4.26 (ddd, J = 10.4, 8.5, 4.9, H-4), 3.81 (dd, J = 11.0, 10.4, Ha-5), 4.41 (dd, J = 11.0, 4.9, Hb-5) [1]

13 C NMR (100.5 MHz, C 5D 5N): [ 1]

Table 1

C-1

38.83

C-17

48.61

Xyl-1

107.72

2

26.72

18

54.44

2

75.57

3

88.75

19...

References

  1. 1.
    A. Inada, M. Kobayashi, H. Murata, T. Nakanishi, Chem. Pharm. Bull. 35, 841 (1987)CrossRefGoogle Scholar

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