Thunberginol D is a

dihydroisocoumarin Dihydroisocoumarins are phenolic compounds related to isocoumarin. Dihydroisocoumarin glucosides A glucoside is a glycoside that is chemically derived from glucose. Glucosides are common in plants, but rare in animals. Glucose is produced whe ...

found in ''Hydrangeae Dulcis Folium'', the processed leaves of ''

Hydrangea macrophylla ''Hydrangea macrophylla'' is a species of flowering plant in the family (biology), family Hydrangeaceae, native plant, native and endemism, endemic to Japan. It is a deciduous shrub growing to tall by or more broad with large heads of pink or ...

var. thunbergii''.

References

Dihydroisocoumarins Catechols {{aromatic-stub