“…The following supporting information can be downloaded at: https:// www.mdpi.com/article/10.3390/ph17060727/s1, Figure S1: Chemical structures of the 13 reference standard compounds selected as marker compounds for the quality control of YWS; Figure S2 4), 4-hydroxycinnamic acid (5), liquiritin apioside (6), vanillin (7), liquiritin (8), ferulic acid (9), narirutin (10), naringin (11), isoliquiritin (12), ononin (13), neoponcirin (14), liquiritigenin (15), poncirin (16), baicalin (17), wogonoside (18), baicalein (19), isoliquiritigenin (20), wogonin (21), glycyrrhizin (22), and γ-oryzanol (23); 5), ononin (6), baicalin (7), poncirin (8), wogonoside (9), baicalein (10), isoliquiritigenin (11), glycyrrhizin (12), and wogonin (13); Figure S4: Comparison of HPLC-PDA chromatograms according to the column temperatures of the 13 selected marker compounds: 35 • C (A), 40 • C (B), 45 • C (C), and 50 • C (D). Liquiritin apioside (1), liquiritin (2), 4-hydroxycinnamic acid (3), narirutin (4), naringin (5), ononin (6), baicalin (7), poncirin (8), wogonoside (9), baicalein (10), isoliquiritigenin (11), glycyrrhizin (12), and wogonin (13); Figure S5: Comparison of HPLC-PDA chromatograms according to the type of acid for the 13 selected marker compounds: 0.1% (v/v)…”