Piotrovsky L B, Soltés L, Stefek M, Trnovec T
Eur J Drug Metab Pharmacokinet. 1986 Apr-Jun;11(2):87-9. doi: 10.1007/BF03189832.
The chemical structure of an ethimizol metabolite found earlier in human urine and saliva was established as 4,5-dicarbamoyl-1-ethylimidazole (didesmethylethimizol). The treatment of biological samples comprised a solid-phase extraction, high-performance thin-layer chromatographic separation and high-performance liquid chromatographic purification techniques. The identification of the metabolite was based on the comparison of a mass spectrum of the substance isolated from the biological fluid with the mass spectra of synthetised reference compounds.