The molecule is a iron chelate in which the four oxygen atoms from pulcherriminic acid are coordinated with two iron atoms. A red extracellular pigment formed by a number of species of bacteria and some species of yeast after growth in media enriched in iron(III). It has a role as a biological pigment. It derives from a pulcherriminic acid.
1,4-dihydroxy-3,6-bis(2-methylpropyl)pyrazine-1,4-diium-2,5-diol;iron