Glicoricone, a phenolic compound, is isolated from a species of licorice. Glicoricone is an inhibitor of monoamine oxidase (MAO), with an IC50 of 140 μM. Glicoricone binds to estrogen receptor (ER) and shows estrogen antagonist activity[1][2].
[1]. Hatano T, et, al. Phenolic constituents of licorice. III. Structures of glicoricone and licofuranone, and inhibitory effects of licorice constituents on monoamine oxidase. Chem Pharm Bull (Tokyo). 1991 May;39(5):1238-43.[2]. Boonmuen N, et, al. Licorice root components in dietary supplements are selective estrogen receptor modulators with a spectrum of estrogenic and anti-estrogenic activities. Steroids. 2016 Jan;105:42-9.