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Identification of 4-methylspinaceamine--a Pictet-Spengler condensation reaction product of histamine with acetaldehyde--in human urine.

机译:鉴定人尿中的4-甲基斯潘宁胺-组胺与乙醛的Pictet-Spengler缩合反应产物

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This study reports the first identification of 4-methylspinaceamine (4-MSPA)-a Pictet Spengler condensation reaction product of histamine with acetaldehyde-in human urine. 4-MSPA was identified and quantified as follows: the target compound was partially purified by solvent extraction from a urine sample spiked with N-methylpiperazine (N-MP) as an internal standard, then derivatized to a naphthylthiourea derivative with 1-naphthylisothiocyanate (NITC) and finally analyzed by HPLC. For verification, 4-MSPA was also analyzed by ion spray-mass spectrometry (IS-MS), using 4-MSPA-d4 as an internal standard. The amount of 4-MSPA in human urine varied between individuals and from day-to-day, ranging from undetectable to 0.80 nmol/mL.
机译:这项研究报告了人类尿液中组胺与乙醛的4-甲基斯潘宁胺(4-MSPA)-Pictet Spengler缩合反应产物的首次鉴定。 4-MSPA的鉴定和定量方法如下:目标化合物是通过溶剂萃取从加有N-甲基哌嗪(N-MP)作为内标的尿液样品中部分纯化的,然后衍生为具有1-萘基异硫氰酸酯(NITC)的萘硫脲衍生物),最后用HPLC分析。为了验证,还使用4-MSPA-d4作为内标通过离子喷雾质谱(IS-MS)分析了4-MSPA。人尿中4-MSPA的量因人而异,且每天变化,范围从不可检测到0.80 nmol / mL。

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