The present invention relates to a novel and efficient process for the preparation of 8-hydroxy-bicyclo[7.3.1]-tridec-4-ene-2,6-diyne ring system which is part of the aglycone of esperemicin and to novel cytotoxic agents having said bicyclic ring system. The present invention also provides a method for treating animal malignant tumors by administering to an animal in need of such treatment an antitumor effective amount of a compound having the formula
本发明涉及一种制备 8-羟基-双环[7.3.1]-
十三烷-4-烯-2,6-二炔环系统的新型高效工艺,该环系是依斯瑞米星(esperemicin)苷元的一部分,本发明还涉及具有所述双环系统的新型细胞毒剂。本发明还提供了一种治疗动物恶性肿瘤的方法,即向需要治疗的动物施用抗肿瘤有效量的具有式