Purity profile of the indoloquinone anticancer agent EO-9 and chemical stability of EO-9 freeze dried with 2-hydroxypropyl-β-cyclodextrin
作者:Van Der Schoot、Vainchtein、Nuijen、Gore、Mirejovsky、Lenaz、Beijnen
DOI:10.1691/ph.2008.8168
日期:——
Two new bladder instillations of the investigational anticancer agent EO-9 containing 2-hydroxypropyl-β-cyclodextrin (HPβCD) and the alkalizers sodium bicarbonate (NaHCO3) and tri(hydroxymethyl)-aminomethane (Tris) were developed. During the stability study of these freeze-dried products, formation of new degradation products was seen. We have characterized these products by high performance liquid chromatography in combination with photodiode array detection and mass spectrometry. In total, five new degradation products were identified of which three were detected in both freeze-dried products and two only in the freeze-dried product composed of EO-9/HPβCD/NaHCO3. Furthermore, the purity profile of two lots of EO-9 drug substance was investigated. Five, probably synthetic intermediates were found. However, the amount of total impurities was very small for both lots of drug substance and below acceptable international limits for pharmaceutical use.
研究人员开发了两种新型膀胱灌注抗癌剂 EO-9,其中含有 2-hydroxypropyl-β-cyclodextrin (HPβCD)、碱化剂碳酸氢钠 (NaHCO3) 和三羟甲基氨基甲烷 (Tris)。在对这些冻干产品进行稳定性研究时,发现了新降解产物的形成。我们采用高效液相色谱法结合光电二极管阵列检测法和质谱法对这些产物进行了表征。我们总共发现了五种新的降解产物,其中三种在两种冻干产品中都能检测到,两种仅在由 EO-9/HPβCD/NaHCO3 组成的冻干产品中检测到。此外,还对两批 EO-9 药物的纯度进行了调查。发现了五种可能是合成的中间体。不过,这两批药物的总杂质量非常小,低于可接受的国际药用限值。