Figure 1

HPLC chromatograms of formononetin and isoliquiritigenin in TFSD. (A) Mixture of epicatechin, formononetin and isoliquiritigenin standards; (B) Analysis of formononetin and isoliquiritigenin in TFSD. Elution peaks: 1: epicatechin; 2: formononetin; 3: isoliquiritigenin.