(23E,25S)-5O-Desmethyl-28-deoxy-25-[(1E)-1,3-dimethylbut-1-enyl]-23-(methoxyimino)milbemycin B; Moxidectin Open-Ring Impurity
(23E,25S)-5O-Desmethyl-28-deoxy-25-[(1E)-1,3-dimethylbut-1-enyl]-23-(methoxyimino)milbemycin B; Moxidectin Open-Ring Impurity