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(organic chemistry)
C9H6O2 The anhydride of o-coumaric acid; a toxic, white, crystalline lactone found in many plants and made synthetically; used in making perfume and soap. Also known as 1,2-benzopyrone.



a lactone of o-coumarinic acid; colorless crystals with an odor of new-mown hay. Melting point, 70°C; boiling point, 291°C. It has the following structural formula:

Coumarin is readily soluble in alcohol and ether and poorly soluble in water. It occurs in glucoside form in many plant species, for example, in sweet clover and sweet grass. Coumarin is industrially prepared from salicylic aldehyde and acetic anhydride. It serves as an odor-enhancing substance in the tobacco and perfume industries.

References in periodicals archive ?
Additionally, when the ligand reacted with salicyldehyde and naphthaldehyde, it afforded coumarin and benzocoumarin derivatives, respectively.
217[degrees] dihedral angle between the newly formed ether ring and the two original coumarin rings, respectively.
Cancer chemopreventive activity of the prenylated coumarin, umbelliprenin, in vivo.
Some quantitative phenolic compound increased and some phenolic compounds found absent by irradiation treatment in purslane such as catechein, coumarin, and cinnamic.
Appropriate aliquots of the coumarin stock solutions were diluted to prepare a mixed stock solution.
According to the phytochemical investigation of column fractions of petroleum ether extract, the three fractions B and E were selected for the antimicrobial investigation due to the presence of more active constituents such as flavonoids, terpenoids, tannins and alkaloids, coumarin than the other fractions.
Coumarin derivatives are present in a large number of vegetables and medicinal plants [2].
254] plates a blue-green fluorescence spot, typical of a coumarin derivative [26], which is consistent with the presence in its UV spectrum of bands at [[lambda].
In 2012, an advisory report had recommended severely limiting the use of 12 ingredients, regarded as the pillars of the luxury perfume industry, including citral, found in lemon and tangerine oils; coumarin, found in tropical tonka beans; and eugenol, found in rose oil.
Coumarin and its derivatives have been used in the preparation of photo-responsive drug vehicles owing to their unique photochemical property.
3 It can help protect against cancer - One of the active compounds in celery is the phytochemical coumarin, which has been proven to be effective in cancer prevention and is capable of enhancing the activity of certain white blood cells that can help to fight cancer.