Commelinin, a blue pigment from the flowers of
Commelina communis, is a complex of 4
Mg2+ ions chelating six anthocyanin molecules.
Cyanosalvianin, a blue pigment from the flowers of
Salvia uliginosa, is a complex formed of six molecules of the anthocyanin type, six molecules of the flavone type and two
magnesium ions. == References ==