Method for preparing total asiatic acid, asiatic acid and madecassic acid from asiatic pennywort herb and use of prepared product
A technology of madecassoic acid and madecassoic acid is applied in the directions of drug combinations, pharmaceutical formulations, steroids, etc., which can solve the problems of time-consuming and labor-intensive, solvent consumption, inability to prepare madecassoside at the same time, etc. Low cost, good for promotion
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[0022] The present invention is further described below:
[0023] Extraction of Centella asiatica total saponins:
[0024] Whole grass coarse powder 1Kg, add 10 liters of water to reflux and extract three times, each time for 1.5 hours, filter, combine the filtrate, concentrate under reduced pressure to a specific gravity of 1.1, add three times the volume of 95% alcohol for precipitation, leave overnight, filter, and decompress the filtrate Concentrate to dryness to obtain 51g, which is the total saponins of Centella asiatica, with a yield of 5.1%.
[0025] Also use 1 kg of whole herb coarse powder, add 10 liters of 60% alcohol to reflux and extract three times, each time for 1.5 hours, the following operations are the same as above, and 56 g of total saponins are obtained, with a yield of 5.6%.
[0026] Preparation of Centella asiatic acid:
[0027] Add 51g of the above-mentioned total saponins of Centella asiatica, add 200ml of 1% potassium hydroxide solution, heat and st...
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