Water-soluble constituents from the leaves of Ilex oblonga |
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| Authors: | Ouyang M-A Wang C-Z Wang S-B |
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| Institution: | Department of Bio-engineering and Technology, Huaqiao University, Quanzhou 362011, Fujian, P. R. China. maouyang@hqu.edu.cn |
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| Abstract: | Four new water-soluble constituents, oblongaroside A (1), oblongar ester A (2), oblongaroside B (3), and oblongaroside C (4), were isolated along with four known compounds: 4-O-beta-D-glucopyranosyl-3-hydroxybenzalcohol (5), 7-methoxyl-4-O-beta-D-glucopyranosyl-3-hydroxybenzalcohol (6), 4-O-beta-D-glucopyranosyl-3-hydroxybenzoic acid (7), and 3,4-dihydroxybenzoic acid (8) from the leaves of Ilex oblonga. Identification of their structures was achieved by 1D and 2D NMR experiments, including (1)H-(1)H COSY, NOESY, HMQC, and HMBC methods and FAB mass spectral data. |
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