New Biotransformation Products of Nemadectins
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Selected nemadectins (formerly LL-F28249 series<sup>1)</sup>) have been fed to a panel of microorganisms with the aim of generating new derivatives. In addition to products resulting from the oxidation of the terminal methyl group (C-29), a unique phosphorylated nemadectin was isolated. The phosphate group was determined to be at C-23 by HMBC between phosphorus and H-23. Milbemycin or nemadectin derivatives with natural substituents involving the 23-hydroxyl group were hitherto unknown.
- The Journal of Antibiotics
The Journal of Antibiotics 54(10), 805-809, 2001-10-25
JAPAN ANTIBIOTICS RESEARCH ASSOCIATION