A new β-class milbemycin derivative from a mutant of genetically engineered strain Streptomyces avermitilis AVE-H39

A new beta-class milbemycin, 13 alpha-hydroxy milbemycin beta(6) (1), was isolated from the fermentation broth of a mutant of genetically engineered strain Streptomyces avermitilis AVE-H39. Its structure and absolute configuration were elucidated by extensive spectroscopic methods and confirmed by single crystal X-ray diffraction. [GRAPHICS]

Automated summary

A new beta-class milbemycin, 13 alpha-hydroxy milbemycin beta(6) (1), was isolated from the fermentation broth of a mutant of genetically engineered strain Streptomyces avermitilis AVE-H39. Its structure and absolute configuration were elucidated by extensive spectroscopic methods and confirmed by single crystal X-ray diffraction.