Structure of Mokko Lactone and Dehydrocostus Lactone
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چکیده
منابع مشابه
Costunolide and Dehydrocostus Lactone as T Lymphocytes Inhibitors of Killing Function of Cytotoxic
7-butyro)actone is required for the inhibitery effect. Costunolide marked]y inhibited the granule exocytosis and the production of inositol phosphates in response to anti-CD3 monoclonal antibody (mAb) stimu]ation at a concentration that did not affect the binding of anti-CD3 mAb. Tyrosine phosphorylation induced by crosslinking of CD3 molecules was significantly inhibited by costunolide in a do...
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In a previous paper’ it was shown that when gluconic (A), galactonic (IS), glucoheptonic (C), and mannonic (D) acids are allowed to stand in aqueous solution, each forms two types of lactones. The lactone with a 6-membered ring forms rapidly but to a small extent, while the “5-ring” lactone forms slowly and to a larger extent. Each acid gives a curve for rate of lactone formation which is the r...
متن کاملLactone Formation from Gluconic Acids and the Structure of Glucose
In a previous paper’ it was shown that when gluconic (A), galactonic (IS), glucoheptonic (C), and mannonic (D) acids are allowed to stand in aqueous solution, each forms two types of lactones. The lactone with a 6-membered ring forms rapidly but to a small extent, while the “5-ring” lactone forms slowly and to a larger extent. Each acid gives a curve for rate of lactone formation which is the r...
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D-glucono-1,5-lactone differs from D-glucopyranose only in that it has a C = O group instead of CHOH group at carbon atom number one. The molecule therefore possesses an intact 3,4 alpha-glycol group and is sweet. However, it autohydrolyses in water solution at room temperature, forming D-gluconic acid and D-glucono-1,4-lactone. As the solution pH falls it becomes sweet-sour and eventually almo...
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The isolation, biological properties and structure elucidation of a sixteen-membered macrocyclic lactone antibiotic, designated A26771B (1), obtained from Penicillium turbatum are discussed.
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1964
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.12.632