A new antibiotic designated nothramicin was isolated from the culture
broth of Nocardia sp. MJ896-43F17 which was closely related to Nocardi
a brasiliensis. It was isolated by the Diaion HP-20 column chromatogra
phy, butyl acetate extraction and purified by HPLC. It inhibited the g
rowth of mycobacteria at the concentration of 1.56 similar to 25 mu g/
ml. Nothramicin was revealed to be a new member of anthracycline antib
iotics by the various spectroscopies.