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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 ?
The female series leads with rose, Geranium and blue flowers, with middle notes of Cashmeran, Coumarine and Oud Wood Jakarta and ends with Vanilla, Musk, Amber and Pure Indian Oud.
Loew and Koch (2008) demonstrated that coumarine derivatives contained in Pelargonium sidoides do not have any hepatotoxic effect.
Phytochemical screening through TLC confirmed the presence of alkaloids, terpenoids, flavonoids, phenols, tannins, and coumarines in the basil extracts which have been shown to possess antibacterial properties (Table 2).
Protective effects of cortex fraxini coumarines against oxonate-induced-hyperuricemia and renal dysfunction in mice.
adenophora showed the presence of alkaloids, saponins, glycosides and coumarines (Table 1).
Species of the genus Citrus are abundant in flavonoids, essential oil, coumarines and pectins (Kuster and Rocha, 2003).