Comparative Efficacy of Haizao Yuhu Decoction Composed of Different Varieties of Glycyrrhiza in Goiter Rats

Figure 1

Chemical structural formula of active substances in HDY. (a) Liquiritin. (b) Glycyrrhizic acid. (c) Forsythin. (d) Hesperidin. (e) Ferulic acid. (f) Osthole.