A PROCESS FOR THE PREPARATION OF DESGLUCODESRHAMNORUSCIN

摘要

The present invention relate to a process for the preparing desglucodesrhamnoruscin, which comprises enzymatically hydrolyzing rhamnose-arabinose hetrosidic bond of Ruscus aculeatus steroid glycosides with crude hydrolase extracted from Aspergillus niger in aqueous solution at pH 5 or in water ethanol mixture containing up to 30% by volume of ethanol, at temperature from 20 to 40° C for times from 3 to 7 days by sequentional removal of (3-glucoside residue followed by removal of a-rhamnoside residue to provide a reaction mixture comprising the desglucodesrhamnoruscin which is recovered in a conventional manner.