(2R)-Eriodictyol is the 2R-enantiomer of Eriodictyol (E600085); used in biological studies as natural compounds as sources of new bifunctional scaffolds targeting cholinesterases and beta amyloid aggregation. Eriodictyl is extracted from Yerba santa, an herb. The leaf is used to make medicine.Yerba santa is used for respiratory conditions including coughs, colds, tuberculosis, asthma, and chronic bronchitis. It is also used for fever and dry mouth. Some people use it to relieve muscle spasms, to loosen phlegm, and as a tonic.