描述
Plumbagin, also known as 5-hydroxy-2-methyl-1,4-naphthoquinone or 2-methyljuglone, is a member of the class of compounds known as naphthoquinones. Naphthoquinones are compounds containing a naphthohydroquinone moiety, which consists of a benzene ring linearly fused to a bezene-1,4-dione (quinone). Plumbagin is slightly soluble (in water) and a very weakly acidic compound (based on its pKa). Plumbagin can be found in black walnut, common walnut, japanese persimmon, and persimmon, which makes plumbagin a potential biomarker for the consumption of these food products. Plumbagin is named after the plant genus Plumbago, from which it was originally isolated. It is also commonly found in the carnivorous plant genera Drosera and Nepenthes. It is also a component of the black walnut drupe .