bletilla/silicio dioksidas

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[A new bibenzyl derivative from Bletilla striata].

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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

[Antibacterial Activity of Chemical Constituents Isolated from Fibrous Roots of Bletilla striata].

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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

[Studies on chemical constituents of Bletilla striata (Thunb) Reichb. f].

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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

[Chemical constituents from tuber of Bletilla striata].

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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-

[Isolation Of Anthelmintic Substance On Clonorchis Sinensis From Tuber Of Bletilla Striata]

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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

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