Canadian Medical Guide > Chemicals and Drugs > Heterocyclic Compounds > Heterocyclic Compounds, 2-Ring > Benzopyrans Terms and Definitions

Benzopyrans

Medical Definition:	Compounds with a core of fused benzo-pyran rings.
Guide Notes:	do not confuse with BENZOPYRENES

Benzopyrans Categories.

	Chromans - Benzopyrans saturated in the 2 and 3 positions.
	Chromones
	Citrinin - Antibiotic and mycotoxin from Aspergillus niveus and Penicillium citrinum.
	Coumarins - Synthetic or naturally occurring substances related to coumarin, the delta-lactone of coumarinic acid. Coumarin itself occurs in the Tonka bean. The various coumarins have a wide range of proposed actions and uses including as anticoagulants, pharmaceutical aids, indicators and reagents, photoreactive substances, and antineoplastic agents.
	Ellagic Acid - A fused four ring compound occurring free or combined in galls. Isolated from the kino of Eucalyptus maculata Hook and E. Hemipholia F. Muell. Activates Factor XII of the blood clotting system which also causes kinin release; used in research and as a dye.
	Hematoxylin - A dye obtained from the heartwood of logwood (Haematoxylon campechianum Linn., Leguminosae) used as a stain in microscopy and in the manufacture of ink.
	Novobiocin - An antibiotic compound derived from Streptomyces niveus. It has a chemical structure similar to coumarin. Novobiocin binds to DNA gyrase, and blocks adenosine triphosphatase (ATPase) activity. (From Reynolds, Martindale The Extra Pharmacopoeia, 30th ed, p189)
	Vitamin E - A generic descriptor for all TOCOPHEROLS and TOCOTRIENOLS that exhibit ALPHA-TOCOPHEROL activity. By virtue of the phenolic hydrogen on the 2H-1-benzopyran-6-ol nucleus, these compounds exhibit varying degree of antioxidant activity, depending on the site and number of methyl groups and the type of isoprenoid

Benzopyrans Medical Definitions and Terms

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