Identification of 2,5-dimethoxy-4-ethylthiophenethylamine and its metabolites in the urine of rats by gas chromatography-mass spectrometry

Li Chan Lin, Ju Tsung Liu, Shiu Huey Chou, Cheng-Huang Lin

Research output: Contribution to journalArticle

26 Citations (Scopus)


A simple and specific method based on gas chromatography-selected ion monitoring-mass spectrometry (GC-SIM-MS) for the analysis of in vivo metabolism of 2,5-dimethoxy-4-ethylthiophenethylamine (2C-T-2) in rats is described. Three male rats were administered 20mg/kg of 2C-T-2 by intra-peritoneal injection, and 24h urine fractions were collected before and after the administration for analysis. After acidic hydrolysis of the urine samples, the metabolites were liquid-liquid extraction and analyzed by a quadruple mass spectrometer in the selected ion monitoring mode. The findings show that four metabolites of 2-(4-ethylthio-2,5-dimethoxyphenyl)-ethanol (Mw: 242), 4-ethylthio-2,5-dimethoxyphenyl acetic acid (Mw: 256), 1-acetoamino-2-(2-hydroxy-4-ethylthio-5-methoxyphenyl)-ethane (Mw: 269) and 1-acetoamino-2-(2-methoxy-4-ethylthio-5-hydroxyphenyl)-ethane (M w: 269) are present and the metabolic pathway for 2C-T-2 in the rat is proposed.

Original languageEnglish
Pages (from-to)241-247
Number of pages7
JournalJournal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences
Issue number2
Publication statusPublished - 2003 Dec 25



  • 2,5-Dimethoxy-4-ethylthiophenethylamine

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Clinical Biochemistry
  • Cell Biology

Cite this