bletilla striata/silica

OBJECTIVE To study the chemical constituents of Bletilla striata. METHODS Various column chromatographies with silica gel and Sephadex LH-20 were employed for the isolation and purification. The structures of the compounds were elucidated on the basis of spectral analyses and chemical

To investigate the chemical constituents isolated from the fibrous roots of Bletilla striata, and to research their antibacterial activities. The native products were isolated and purified by silica gel, Sephadex LH-20 column chromatography and preparative HPLC. Their structures were elucidated on

OBJECTIVE To study the chemical constituents of Bletilla striata. METHODS The constituents were separated and purified by column chromatography with silica gel, and identified by NMR, MS and physical data. RESULTS Three compounds were isolated and identified as hexacosanoic alcohol

Eighteen compounds were isolated from the EtOAc soluble fraction of Bletilla striata by various chromatographic techniques, such as silica gel, ODS, Sephadex LH-20, RP-HPLC. Their structures were identified by spectroscopic methods and physicochemical properties, as 5-hydroxy-2-(p-hydroxybenzyl)- 3-

The present work was done to isolate the anthelmintic substance from the tuber of Bletilla striata which grows Gangweon-do of the Korea peninsula. The dried B. striata tuber was extracted with ethyl ether by a Soxhlet extractor at 40 degrees C for 24 hours, and then the extract was separated into