Substance used in treating acne

Wikipedia Word definitions in Wikipedia
Psoralen (also called psoralene ) is the parent compound in a family of natural products known as furocoumarins . It is structurally related to coumarin by the addition of a fused furan ring, and may be considered as a derivative of umbelliferone . Psoralen ...

Wiktionary Word definitions in Wiktionary
n. (context medicine English) Any of a group of furanocoumarins, from the seeds of various plants, that are used to treat psoriasis, eczema and vitiligo