This invention relates to novel elsamicin A derivatives having 6-O-alkyl substitutent, a process for producing said elsamicin A derivatives, antitumor compositions containing the same as the active ingredient, and a method for therapy using said compositions.
这项发明涉及具有6-O-烷基取代基的新型elsamicin A衍
生物,一种制备所述elsamicin A衍
生物的方法,含有其作为活性成分的抗肿瘤组合物,以及使用该组合物的治疗方法。