Antibiotic LY 92 which can kill mites, extracted from the mycelium that Streptomyces aureus fermented, belongs to macrolides antibiotics.The centrifugal chromatography was used to obtain the pure one.

• 抗生素LY-92系由金黄色链霉菌的发酵菌丝体中提取而得的具有杀螨活性的大环多内酯抗生素。