esculin

Aesculin, also called æsculin or esculin, is a coumarin glucoside that naturally occurs in the trees horse chestnut (Aesculus hippocastanum), California buckeye (Aesculus californica), prickly box (Bursaria spinosa), and daphnin (the dark green resin of Daphne mezereum). It is also found in dandelion coffee.

As medication, aesculin is sometimes used as a vasoprotective agent.Aesculin is also used in a microbiology laboratory to aid in the identification of bacterial species (especially Enterococci ...