Stilbene compound originated from natural indigo and having anti-enteritis activity, and preparation method and application thereof
A technology of stilbenes and compounds, applied in ether preparation, organic chemistry, digestive system, etc., to achieve the effect of strong practicability, economical cost and simple extraction method
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[0077] The extraction method of 5-(2,4-dimethoxyphenethyl)benzene-1,2,3-triol (DP-I), comprises the steps:
[0078] 1) Pulverize Qingdai (10Kg), cold-soak with 95% ethanol (25L×3 times), combine the extracts, concentrate under reduced pressure, and obtain a crude extract (950g);
[0079] 2) Disperse the crude extract of Qingdai obtained in step 1) in water, and sequentially extract with petroleum ether (5L×3 times) and ethyl acetate (5L×3 times) to obtain ethyl acetate extract (420g);
[0080] 3) The ethyl acetate extract obtained in step 2) is passed through the D101 macroporous adsorption resin for impurity removal and adsorption, followed by elution with 30% ethanol (10L) and 85% (15L) ethanol, and the 85% ethanol eluate is collected, Concentrate under reduced pressure to obtain 80% ethanol eluate extract (195g);
[0081] 4) In step 3), elute the extract with 85% ethanol, separate it with normal phase silica gel, and use volume ratios of 15:1 (6 column volumes), 10:1 (6 co...
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