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[Studies on constitutes from Taraxacum mongolicum].
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OBJECTIVE
To study the chemical constituents of Taraxacum mongolicum.
METHODS
Repeated column chromatography over silica gel, C-18 and Sephadex LH-20 were used to isolate chemical constitutes and their structures were elucidated by spectroscopic methods MS, 1H-NMR, 13C-NMR including 2D-NMR
[Studies on chemical constituents from herbs of Taraxacum mongolicum].
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OBJECTIVE
To investigate the chemical constituents of the herbs of Taraxacum mongolicum.
METHODS
The chemical constituents were isolated by various column chromatographic methods and their structures elucidated mainly by NMR and MS evidences.
RESULTS
Forty-four components were obtained and
A high-speed counter-current chromatography- HPLC-DAD method for preparative isolation and purification of two polymethoxylated flavones from Taraxacum mongolicum.
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After an initial clean-up step on silica gel, a preparative high-speed counter-current chromatography coupled with on-line high-performance liquid chromatography-diode array detection method (HSCCC-HPLC-DAD) was successfully developed for the isolation and determination two polymethoxylated
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