代谢
该研究旨在研究N-甲基-2-吡咯烷酮在人体内的代谢途径。三名健康的男性志愿者口服了100毫克N-甲基-2-吡咯烷酮。在连续九天的时间里收集了所有的尿液。通过气相色谱/质谱(GC/MS)对代谢物进行鉴定和定量。在尿液中发现了N-甲基-2-吡咯烷酮、5-羟基-N-甲基-2-吡咯烷酮(5-羟基-N-甲基-2-吡咯烷酮)、N-甲基琥珀酰亚胺和2-羟基-N-甲基琥珀酰亚胺。N-甲基-2-吡咯烷酮、5-羟基-N-甲基-2-吡咯烷酮、N-甲基琥珀酰亚胺和2-羟基-N-甲基琥珀酰亚胺的平均排泄分数分别为0.8%、44%、0.4%和20%。5-羟基-N-甲基-2-吡咯烷酮或2-羟基-N-甲基琥珀酰亚胺没有与葡萄糖酸或硫酸结合。口服剂量的N-甲基-2-吡咯烷酮的三分之一没有在尿液中以N-甲基-2-吡咯烷酮、5-羟基-N-甲基-2-吡咯烷酮、N-甲基琥珀酰亚胺或2-羟基-N-甲基琥珀酰亚胺的形式回收。5-羟基-N-甲基-2-吡咯烷酮、N-甲基琥珀酰亚胺和2-羟基-N-甲基琥珀酰亚胺在尿液中的半衰期分别约为4、8和17小时。
The aim was to study the metabolic pathway for N-methyl-2-pyrrolidone in humans. Three healthy male volunteers were administered 100 mg N-methyl-2-pyrrolidone orally. All urine was collected during nine consecutive days. The identification and quantification of the metabolites were performed by gas chromatography/mass spectrometry (GC/MS). N-Methyl-2-pyrrolidone, 5-hydroxy-N-methyl-2-pyrrolidone (5-hydroxy-N-methyl-2-pyrrolidone), N-methylsuccinimide, and 2-hydroxy-N-methylsuccinimide were found in urine. The mean excreted fractions for N-methyl-2-pyrrolidone, 5-hydroxy-N-methyl-2-pyrrolidone, N-methylsuccinimide, and 2-hydroxy-N-methylsuccinimide were 0.8%, 44%, 0.4%, and 20%, respectively. There was no conjugation with glucoronic acid or sulfate or either 5-hydroxy-N-methyl-2-pyrrolidone or 2-hydroxy-N-methylsuccinimide. One-third of the orally dosed N-methyl-2-pyrrolidone was not recovered in urine as either N-methyl-2-pyrrolidone, 5-hydroxy-N-methyl-2-pyrrolidone, N-methylsuccinimide, or 2-hydroxy-N-methylsuccinimide. The half-lives for 5-hydroxy-N-methyl-2-pyrrolidone, N-methylsuccinimide, and 2-hydroxy-N-methylsuccinimide in urine were approximately 4, 8, and 17 hr, respectively.
来源:Hazardous Substances Data Bank (HSDB)