Extractive of Herba Rabdosiae diterpene, its prepn. method and its medicine composition
A technology of extracts and compositions, applied in the field of Radix japonicus extract and its preparation method and pharmaceutical composition, which can solve the problems of unstable quality and curative effect, large dosage, etc.
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preparation example 1
[0025] The preparation of preparation example 1 oridonium diterpene extract
[0026] Take 2 kg of the aboveground part of dried Radix japonicus and extract 2 times with 95% ethanol, the amount of alcohol used is 8 times, and the time of each extraction is 60 minutes, the filtrate is combined, the filtrate is concentrated under reduced pressure to 8 times the volume of the medicinal material, and the aqueous solution is added When the alcohol concentration is 40%, let it settle for 12 hours, and filter; the filtrate is decompressed to recover ethanol until it has no alcohol smell, and Na 2 CO 3 to 5%, extracted twice with ethyl acetate in equal amounts, recovered the solvent under reduced pressure, and dried to obtain 12g of Rubescens extract. Through HPLC detection, the content of total diterpenes was 50.2%, and the content of Oridonin A was 25.8%. %.
preparation example 2
[0027] The preparation of preparation example 2 oridonium diterpene extract
[0028] Take 2 kg of dry Radix Grass leaves and extract 4 times with 90% ethanol, the amount of alcohol used is 9 times, and the extraction time is 120 minutes each time, the filtrate is combined, the filtrate is concentrated under reduced pressure to 10 times the volume of the medicinal material, and 1% AlCl 3 Aqueous solution until the alcohol concentration is 50%, let it settle for 24 hours, and filter; the filtrate is decompressed to recover ethanol until it has no alcohol smell, put it on the AB-8 macroporous resin column, first elute with water, then elute with 20% ethanol, and then use The latter was eluted with 95% ethanol, the latter was collected, the solvent was recovered under reduced pressure, and dried to obtain 15 g of Rubescens extract. After HPLC detection, the content of total diterpenes was 61.2%, and the content of Rubescensin A was 32.1%.
preparation example 3
[0029] The preparation of preparation example 3 oridonium diterpene extract
[0030] Take 2kg of dry Radix Grass leaves and use supercritical CO 2 Extraction, use 95% ethanol as entrainer, the entrainer dosage is 4000mL, combine the extracts, add 0.5% alum aqueous solution until the alcohol concentration is 60%, let it settle for 36 hours, filter; the filtrate decompresses and recovers ethanol until it has no alcohol smell , go up AB-8 macroporous resin column, first water elution, then 30% ethanol elution, then 90% ethanol elution, collect the latter, reclaim the solvent under reduced pressure, and dry to obtain 13g of Radix radiata extract, As detected by HPLC, the content of total diterpenes was 82.2%, and the content of oridonin was 50.8%.
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