Arbutin(β-Arbutin) is a glycoside; a glycosylated hydroquinone extracted from the bearberry plant in the genus Arctostaphylos; inhibits tyrosinase and thus prevents the formation of melanin.

(±)-Taxifolin ((±)-Dihydroquercetin) is the racemate of Taxifolin, a flavonoid with anti-tyrosinase and anti-fibrotic activity, commonly found in onion, silymarin, French maritime pine bark, and Douglas fir bark. It inhibits collagenase with an IC50 value of 193.3 μM and acts as a free radical scavenger with antioxidant capacity.

Endoxifen, a tamoxifen metabolite, is effective specific Estrogen Response Modifier (SERM).