Tags: Chemical Compound, Chemical Substance.
Anthocyanidins are common plant pigments. They are the sugar-free counterparts of anthocyanins based on the flavylium ion or 2-phenylchromenylium which is a type of oxonium ion (chromenylium is referred also to as benzopyrylium). They form a large group of polymethine dye. In particular anthocyanidins are salt derivatives of the 2-phenylchromenylium cation also known as flavylium cation. As shown in the figure below the phenyl group at the 2-position can carry different substituents.
