Identification of a 3-Hydroxylated Tacrine Metabolite in Rat and Man: Metabolic Profiling Implications and Pharmacology
作者:William F. Pool、Thomas F. Woolf、Michael D. Reily、Bradley W. Caprathe、Mark R. Emmerling、Juan C. Jaen
DOI:10.1021/jm9602266
日期:1996.1.1
Discrepancies in urinary metabolic profiles in rats administered tacrine (1) suggested the presence of an unidentified metabolite of 1. Chromatographic methods were developed that allowed isolation of a metabolite fraction containing both 1-hydroxytacrine (2) and an unknown metabolite from rat urine. Mass spectral analysis indicated this metabolite to be a monohydroxylated derivative, which upon two
服用他克林(1)的大鼠的尿液代谢谱差异表明存在未鉴定的1的代谢物。开发了色谱方法,可从大鼠尿液中分离出含有1-羟基他克林(2)和未知代谢物的代谢物部分。质谱分析表明该代谢物为单羟基化衍生物,经二维COZY NMR分析,可将其指定为3-羟基他克林(4)。通过独立合成4证实了这种结构分配。化合物4也被鉴定为1的人尿代谢产物。从生物学上讲,发现4具有体外的人红细胞乙酰胆碱酯酶抑制活性,类似于2和4-羟基他克林( 5),并且比1小约8倍。