Structural Elucidation of an Uncommon Phenylethylamine Analogue in Urine Responsible for Discordant Amphetamine Immunoassay Results
作者:C. Marson、S. Schneider、F. Meys、R. Wennig
DOI:10.1093/jat/24.1.17
日期:2000.1.1
The present paper describes investigations following the analysis of a urine specimen containing important amounts of an unknown substance detected by gas chromatography-mass spectrometry (GC-MS) analysis. FPIA analysis was positive (cutoff 0.3 mg/L) and TriageTM 8 rapid lest was negative (cutoff 1 mg/L) for amphetamines. Considering the GC-MS spectrum, two different molecules, for example, N-ethyl-1-(3,4-methylenedioxyphenyl) ethylamine (1) or N-ethyl-4-melhoxyamphetamine (2), have been suspected. Synthesis of these two compounds was carried out together with spectral (MS, 1H and 13C NMR, IR, UV) and chromatographic (GC) characterization as well as determination of immunological cross reactlvities (FPIA and Triage 8). The unknown compound present in the urine specimen has been finally identified as N-ethyl-4-methoxyamphetamine (2), an uncommon amphetamine analogue.
本文介绍了在对通过气相色谱-质谱(GC-MS)分析检测出含有大量未知物质的尿液标本进行分析后所开展的调查。FPIA 分析结果呈阳性(临界值为 0.3 毫克/升),而 TriageTM 8 快速检测法对苯丙胺呈阴性(临界值为 1 毫克/升)。考虑到 GC-MS 图谱,我们怀疑有两种不同的分子,例如 N-乙基-1-(3,4-亚甲二氧基苯基)乙胺(1)或 N-乙基-4-甲氧基苯丙胺(2)。对这两种化合物进行了合成,并进行了光谱(质谱、1H 和 13C NMR、红外光谱、紫外光谱)和色谱(气相色谱)鉴定,以及免疫交叉反应(FPIA 和 Triage 8)测定。尿液标本中的未知化合物最终被鉴定为 N-乙基-4-甲氧基苯丙胺(2),这是一种不常见的苯丙胺类似物。