value of 0.38 x 10(-7) mol J(-1). Laser flash photolysis of IQ-FdUrd in Ar-purged aqueous solution with dimethylaniline as an electron donor gave rise to a transient absorption spectrum characteristic of semiquinone radical anion, which decayed via second order kinetics. It is most likely that bimolecular disproportionation of intermediate semiquinone radicals occurs to release 5-FdUrd. IQ-FdUrd showed
我们合成了具有
吲哚醌结构(IQ-FdUrd)的5-
氟脱氧
尿苷(5-FdUrd)衍
生物,以表征
水溶液中的辐射分解和低氧条件下针对
EMT6 / KU细胞的辐射激活的细胞毒性。IQ-FdUrd在低氧(但不需氧)照射下释放抗肿瘤剂5-FdUrd,G值为0.38 x 10(-7)mol J(-1)。IQ-FdUrd在Ar吹扫的
水溶液中以二甲基
苯胺作为电子给体的激光快速光解产生了半醌自由基阴离子的瞬态吸收光谱特性,该特性通过二阶动力学衰减。最有可能发生中间半醌自由基的双分子歧化以释放5-FdUrd。IQ-FdUrd在低氧照射下以辐射剂量依赖性方式显示出增强的针对
EMT6 / KU细胞的细胞毒性。IQ-FdUrd可能是新型辐射激活抗肿瘤前药的原型化合物,可用于低氧肿瘤的辐射治疗。