英文别名(6R,25R)-28-Deoxy-25-ethyl-6,28-epoxy-5-demethoxy-5-oxomilbemycin B; (6R,25R)-28-Deoxy-6,28-epoxy-25-ethyl-5-oxo-5-demethoxymilbemycin B; 5-Ketomilbemycin A4; Milbemycin EP impurities E; Milbemycin Impurity 5; Milbemycin Oxime Impurity 5 (Milbemycin Oxime EP Impurity E) 
