The structures of new antitumor antibiotics, Duocarmycin A, C1 and C2, isolated from the culture broth of Streptomyces sp., have been determined on the basis of chemical and physicochemical evidence.
                                    从链霉菌培养液中分离出的新型抗肿瘤抗生素Duocarmycin A、C1和C2的结构,已经根据
化学和物理
化学证据确定。