Ursonic Acid (TOS-BB-0966) belongs to the family of Ursane Triterpenes whose structure is based on the pentacyclic ursane skeleton. It has potential as HIV-1 Protease Inhibitor.
Arbutin (p-Arbutin)(β-Arbutin) is a glycosylated hydroquinone extracted from the bearberry plant in the genus Arctostaphylos and can inhibit tyrosinase and thus prevent the formation of melanin.