Scopoletin is a coumarin that can be isolated from plants of the genus Scopolia. It has been identified as a natural antifungal compound. Scopoletin was also demonstrated to be an MAO inhibitor capable of increasing dopamine levels in mice and is therefore of potential interest for developing treatments for neurodegenerative diseases.

Esculetin (aka Aesculetin) is a derivative of coumarin. It is a naturally occurring lactone which is present in chicory and in many toxic medicinal plants; often found in a glycosidic form or conjugated to caffeic acids. It is used as an ingredient in some sunscreens, but there is evidence that it acts as a photosensitizer for DNA damage. Esculetin has been investigated in a number of cellular and animal cancer models, and for other conditions such as dry eyes.

Daphnetin (DAP), a natural coumarin derivative isolated from Chinese medicinal herbs, possesses abundant biological activities, such as anti-inflammatory, antioxidant, antimalarial and anti-arthritic. Experiments on mice have shown, that DAP exerts neuroprotective and anti-inflammatory effects, and the potential mechanism is involved the inhibition of TLR4/NF-κB mediated inflammatory signaling pathway. Besides, DAP, a multi-targeted medication, can have the application for the anti-angiogenesis and cancer therapy, through the inhibition of the IKKs/IκBα/NF-κB, Src/FAK/ERK1/2 and Akt signaling pathways. It is known, that protein kinases play key roles in the control of cell proliferation, differentiation, and metabolism. Daphnetin inhibits tyrosine-specific protein kinase, EGF receptor, serine/threonine-specific protein kinases, including cAMP-dependent protein kinase (PKA) and protein kinase C (PKC).

Umbelliferone is a natural product of the coumarin family which can be found in many different plant species. It absorbs ultraviolet light strongly at several wavelengths and is used in sunscreens. It has also been reported to have antioxidant, anti-inflammatory, and anti-nocioceptive properties.