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lactone

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.01 sec.
lactone /lac·tone/ (lak´tōn) a cyclic organic compound in which the chain is closed by ester formation between a carboxyl and a hydroxyl group in the same molecule.
lac·tone (lktn)
n.
An anhydride formed by the removal of a water molecule from the hydroxyl and carboxyl radicals of hydroxy acids.

lac·tonic (-tnk) adj.

lactone [lak´tōn]
a cyclic organic compound in which the chain is closed by ester formation between a carboxyl and a hydroxyl group in the same molecule.

lactone (lakˑ·tōn),
n a compound with a high molecular mass that comprises an ester linked to a ring structure of carbon atoms. Significant members of this group are coumarin and its derivatives. It is found in expressed oils and some absolutes. It has been used as an anticoagulant, sedative, and antipyretic. Harmful effects include skin allergies and potential toxicity to the nervous system.

lactone,
n an organic anhydride formed from a hyroxyacid by the loss of water between an 2OH and a 2COOH group.

lactone
1. an aromatic liquid from lactic acid.
2. a cyclic organic compound in which the chain is closed by ester formation between a carboxyl and a hydroxyl group in the same molecule.


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Some styryl lactone derivatives exhibited strong anti-proliferation activity in MCF-7 and MDA-MB-231 cells, while partial inhibition in T47D cells (Hawariah and Stanslas, 1998a).
Levamisole resistance is also on the increase and there have now been some reports of Macrocyclic lactone (ivermectin etc) resistance.
Alternatively or additionally, the Michael donor contains beta-ketoamide, enamine carboxylate, enamine amide, pyrazolone, isoxazolone, hydantoin, rhodanine, thio-substituted unsaturated ester, thio-substituted lactone or phosphonite or phosphinite ester groups.
 
 
 
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