Canadian Medical Guide > Chemicals and Drugs > Organic Chemicals > Lactones Terms and Definitions

Lactones

Medical Definition:

Lactones Categories.

	4-Butyrolactone - One of the FURANS with a carbonyl thereby forming a cyclic lactone. It is an endogenous compound made from gamma-aminobutyrate and is the precursor of gamma-hydroxybutyrate. It is also used as a pharmacological agent and solvent.
	Ivermectin - A mixture of ivermectin component B1a (RN 71827-03-7) and B1b (RN 70209-81-3), which is a semisynthetic product from Streptomyces avermitilis. A potent macrocyclic lactone disaccharide antiparasitic agent used to prevent and treat parasite infestations in animals. The compound has activity against internal and external parasites and has been found effective against arthropods, insects, nematodes, filarioidea, platyhelminths, and protozoa.
	Macrolides - A group of macrocyclic compounds formed by chain extension of multiple PROPRIONATES and cyclized into a large (typically 12, 14, 16) membered lactone. They are often glycosylated. Many of them are ANTIBIOTICS.
	Propiolactone - Disinfectant used in vapor form to sterilize vaccines, grafts, etc. The vapor is very irritating and the liquid form is carcinogenic.
	Spironolactone - A potassium sparing diuretic that acts by antagonism of aldosterone in the distal renal tubules. It is used mainly in the treatment of refractory edema in patients with congestive heart failure, nephrotic syndrome, or hepatic cirrhosis. Its effects on the endocrine system are utilized in the treatments of hirsutism and acne but they can lead to adverse effects. (From Martindale, The Extra Pharmacopoeia, 30th ed, p827)
	Venturicidins - Toxic substances isolated from various strains of Streptomyces. They are 20-membered macrolides that inhibit oxidative phosphorylation and mitochondrial ATPases. Venturicidins A and B are glycosides. Used mainly as tools in the study of mitochondrial function.
	Zearalenone - (S-(E))-3,4,5,6,8,10-Hexahydro-14,16-dihydroxy-3-methyl-1H-2-benzoxacyclotetradecin-1,7(8H)-dione. One of a group of compounds known under the general designation of resorcylic acid lactones. Cis, trans, dextro and levo forms have been isolated from the fungus Gibberella zeae (formerly Fusarium graminearum). They have estrogenic activity, cause toxicity in livestock as feed contaminant, and have been used as anabolic or estrogen substitutes.

Lactones Medical Definitions and Terms

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