![Costunolide](https://upload.wikimedia.org/wikipedia/commons/e/e6/Costunolide.svg)
Germacranolides are a group of natural chemical compounds classified as
sesquiterpene lactone
Sesquiterpene lactones (SLs) are a class of sesquiterpenoids that contain a lactone ring. They are most often found in plants of the family Asteraceae (daisies, asters). Other plant families with SLs are Umbelliferae (celery, parsley, carrots) an ...
s. They are found in a variety of plant sources.
References
Sesquiterpene lactones
Oxygen heterocycles
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