artemetin/タンポポ属

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

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

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