Bergapten
Encyclopedia
Bergapten is a psoralen
Psoralen
Psoralen 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...

 (also known as furocoumarins) found in bergamot essential oil, in other citrus essential oils, and in grapefruit juice. It is the chemical in bergamot oil that causes phototoxicity. Bergapten-free bergamot
Bergamot
Bergamot may refer to:*The Bergamot orange*Monarda, genus of herbs of similar odor to the Bergamot orange; in particular**Monarda didyma, called Bergamot, Scarlet Beebalm, Scarlet Monarda, Oswego Tea, or Crimson Beebalm...

essential oil or synthetics are now used in perfumery.
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