Patent ID: 9370540
Filing Date: 2016-06-21
CPC Classification: A61K,A61P,C07J

Claim Text:
1. A method for providing a K2-enriched FU-LING extract, comprising: (a) mixing a FU-LING with a solvent to provide a first mixture; (b) alkalizing the first mixture to provide a second mixture; (c) acidifying the second mixture to provide a third mixture, which contains K1 of no more than 0.5 wt %, based on the total weight of K1 and K2; (d) alkalizing the third mixture to provide a fourth mixture, wherein the fourth mixture has a pH value of more than 7; and (e) neutralizing the fourth mixture, wherein the K1 is at least one of pachymic acid and dehydropachymic acid, and the K2 is at least one of tumulosic acid, dehydrotumulosic acid, polyporenic acid C and 3-epi-dehydrotumulosic acid.