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MB Sample ID: SA043155

Local Sample ID:PooledUrine_MSMS_20
Subject ID:SU000811
Subject Type:Human
Subject Species:Homo sapiens
Taxonomy ID:9606
Species Group:Human

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Sample Preparation:

Sampleprep ID:SP000818
Sampleprep Summary:Urine was thawed on ice and centrifuged to remove particulates prior to analysis. N1-acetylisoputreanine-γ-lactam was synthesized as previously described. Acetylation was performed with N-(3-Aminopropyl) pyrrolidin-2-one (0.75 M) and acetyl chloride (0.75 M) in methanol and 0.5 M PBS (1:1) adjusted to pH 7.0 with sodium hydroxide. The reaction products were extracted with dichloromethane, dried, suspended in 2 ml LC-MS grade water and stored at 4˚C. Prior to LC-MS analyses, the synthetic compound was diluted 1:100 in water or human urine.