Effects of glycyrrhizin acid and licorice flavonoids on LPS-induced cytokines expression in macrophage Multi-objective optimization of purification technology for licorice flavonoids based on entropy-weight method The Effect of Precursor Feeding on Flavonoids Biosynthesis in Cell Suspension Cultures of Glycyrrhiza inflata Bat. Regulation of licorice flavonoids on cytokines mRNA expression and oxidation reaction in mice with lung inflammation