Coumarin glycosides

Aesculin, also called æsculin or esculin, is a coumarin glucoside that naturally occurs in the trees horse chestnut (Aesculus hippocastanum), California buckeye (Aesculus californica), and prickly box (Bursaria spinosa). It is also found in daphnin (the dark green resin of Daphne mezereum), dandelion coffee, and olive bark. It is reported to be present in olive bark, but not in olive leaf; therefore, identification of aesculin in abundance in an olive extract indicates that the extract has been derived from olive bark.

Apterin is a furanocoumarin and the glucoside of vaginol. It has been isolated from the root of plants in the family Apiaceae such as members of the genus Angelica, including the garden angelica and Zizia aptera.