Hydrangea macrophylla
Hydrangenol is a dihydroisocoumarin. It can be found in "Hydrangea macrophylla", as well as its 8-"O"-glucoside. (−)-Hydrangenol 4′-"O"-glucoside and (+)-hydrangenol 4′-"O"-glucoside can be found in Hydrangeae Dulcis Folium, the processed leaves of "H. macrophylla" var. "thunbergii".