期刊
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
卷 23, 期 20, 页码 5710-5713出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmcl.2013.08.002
关键词
Nemadectin congeners; Acaricidal activity; Nematocidal activity; Streptomyces microflavus neau3
资金
- National Natural Science Foundation of China [31171913]
- National Key Project for Basic Research [2010CB126102]
- National Key Technology RD Program [2012BAD19B06]
- National Outstanding Youth Foundation [31225024]
- Program for New Century Excellent Talents in University [NCET-11-0953]
- Innovative Program for Postgraduates in Heilongjiang Province [YJSCX2012-046HLJ]
Two nemadectin congeners 1 and 2 were isolated from the fermentation broth of a mutant strain (Y-3) of Streptomyces microflavus neau3. Their structures were determined on the basis of extensive spectroscopic analysis and comparison with data from the literature. Compound 2 possessed a 5-membered ring lactone that is unprecedented among known milbemycins and avermectins. Both compounds 1 and 2 exhibited potent acaricidal activity and nematocidal activity. Especially, compound 2 demonstrated impressive acaricidal activity against adult mites with an IC50 of 2.3 +/- 0.9 mu g/mL and mite eggs with an IC50 of 17.5 +/- 2.1 mu g/mL and nematocidal activity against Caenorhabditis elegans with an IC50 of 0.7 +/- 0.2 mu g/mL, which are higher than those of nemadectin and the known commercial acaricide and nematocide milbemycin A3/A4. (C) 2013 Elsevier Ltd. All rights reserved.
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