Stability Studies of Topical Carbonic Anhydrase Inhibitor 6-Hydroxyethoxy-2-Benzothiazole Sulfonamide
作者:Chiao-Hsi Chiang、Chu-Huang Hsieh、Da-Wen Lu、Kou-Dong Kao
DOI:10.1002/jps.2600810322
日期:1992.3
A new carbonic anhydrase inhibitor, 6-hydroxyethoxy-2-benzothiazole sulfonamide (6-hydroxyethyoxyzolamide), was studied to determine its stability in aqueous solution from pH 2.9 to 9.2 at a constant ionic strength of 0.15 M. This newly synthesized derivative of ethoxyzolamide has demonstrated clinical efficacy for use as an ophthalmic drug to lower intraocular pressure. Drug solution in sealed ampules
研究了一种新型的碳酸酐酶抑制剂6-羟基乙氧基-2-苯并噻唑磺酰胺(6-羟基乙氧基唑酰胺),以确定其在pH 2.9至9.2的水溶液中的恒定离子强度为0.15 M的稳定性。这种新合成的乙氧基唑酰胺衍生物具有证明了用作眼药以降低眼内压的临床功效。将密封安瓿中的药物溶液置于两个温度(75和85 +/- 0.2摄氏度)或四个温度(75、80、85和90 +/- 0.2摄氏度)的恒温下。通过已知的HPLC方法分析样品。结果表明6-羟基乙氧基唑酰胺在pH 4至5.5下最稳定。尽管如此,pH 7.0和8.0的药物水溶液仍然足够稳定,使用实验确定的Arrhenius方程基于高温下的动力学数据外推。通过光谱分析鉴定该降解化合物具有取代原始-SO 2 NH 2基团的羟基。