Anthocyanidins are accepted bulb pigments. They are the sugar-free counterparts of anthocyanins based on the flavylium ion or 2-phenylchromenylium, which is a blazon of oxonium ion (chromenylium is referred aswell to as benzopyrylium). They anatomy a ample accumulation of polymethine dye. In accurate anthocyanidins are alkali derivatives of the 2-phenylchromenylium cation, aswell accepted as flavylium cation. As apparent in the amount below, the phenyl accumulation at the 2-position can backpack altered substituents. The counterion of the flavylium cation is mostly chloride. With this absolute charge, the anthocyanidins alter from added flavonoids.

Anthocyanidin extracts are aswell acclimated as appearance agents in wines, bake-apple juices and beverages. They are important because of their absolute impacts on health. In 12th century, dishonest healers recommended bilberry to action menstrual problems. During World War II, Anthocyanidins were acclimated to advance British pilots’ night vision.