The present invention relates to conjugates of therapeutically useful anthracyclines with carriers such as polyclonal and monoclonal antibodies, proteins or peptides of natural or synthetic origin; methods for their preparation, pharmaceutical composition containing them and use thereof in treating certain mammalian tumors.本發明係關於治療上適用之蒽環黴素與諸如天然或合成來源之多株及單株抗體、蛋白質或肽之載體的結合物;其製備方法、含有其之醫藥組合物及其治療某些哺乳動物腫瘤之用途。