| abstract |
The invention concerns a method for preparing an extract from a preparation of approximately 90% pure 20-hydroxyecdysone that comprises the following steps: g) Hot dissolution of approximately 90% pure 20-hydroxyecdysone in methanol, filtration and partial concentration, h) Addition of 1 to 5 volumes of acetone, i) Cooling to a temperature of between 0 and 5°C while stirring, j) Filtration of the obtained precipitate, k) Successive rinses with acetone and water, and l) Drying. |