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butin/dichloromethane

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Separation of flavonoids from the seeds of Vernonia anthelmintica Willd by high-speed counter-current chromatography.

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Several flavonoids including 2',3,4,4'-tetrahydroxychalcone, 5,6,7,4'-tetrahydroxyflavone and butin, were separated from the seeds of Vernonia anthelmintica Willd by high-speed counter-current chromatography using a two-step operation. Two different types of solvent systems were used:

Antimicrobial and antioxidative activities of bioactive constituents from Hydnophytum formicarum Jack.

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Hydnophytum formicarum Jack. (Rubiaceae) is a medicinal plant whose tubers possesses cardiovascular, anti-inflammatory and antiparasitic effects and have been used for the treatment of hepatitis, rheumatism and diarrhea. Herein we report the isolation of its active constituents and the testing of
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