René LAFONT,Pierre DILDA,Waly DIOH,Philippe DUPONT,Susanna DEL SIGNORE,Stanislas VEILLET
申请号：
US16609208
公开号：
US20200148718A1
申请日:
2018.04.30
申请国别(地区):
US
年份:
2020
代理人:
摘要：
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, andl) Drying.
