Analogues of 9-oxo-9H-xanthene-4-acetic acid (XAA) bearing small, lipophilic 5-substituents are among the most dose-potent compounds yet reported with the capability of causing hemorrhagic necrosis of implanted colon 38 tumors in mice. To further extend structure-activity relationships among this class of compound, a series of XAA derivatives bearing two small lipophilic groups at various positions
带有小的,亲脂性的5个取代基的9-氧代9H-
氧杂蒽-4-
乙酸(X
AA)的类似物是迄今已报道的最强剂量化合物,具有引起小鼠植入的结肠38肿瘤出血性坏死的能力。为了进一步扩展这类化合物之间的构效关系,已经制备并评估了一系列在不同位置带有两个小的亲脂基团的X
AA衍
生物。特别是5,6-二取代的化合物始终显示出高
水平的剂量效力和活性,这表明这是取代的9-氧代-9H-
氧杂蒽-4-
乙酸中的最佳构型。5,6-二甲基和5-甲基-6-甲氧基是最有效的类似物,