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  • Title: In vivo metabolism of leukotriene C4 in man: urinary excretion of leukotriene E4.
    Author: Orning L, Kaijser L, Hammarström S.
    Journal: Biochem Biophys Res Commun; 1985 Jul 16; 130(1):214-20. PubMed ID: 2992461.
    Abstract:
    Five - 20 nmoles of [5,6,8,9,11,12,14,15-3H8]leukotriene C4 was injected into three male volunteers. Forty-eight percent of the administered 3H was recovered from urine and 8% from feces, within a 72 hr period. Of the total urinary radioactivity 44% was excreted during the first hour after injection. This activity was mainly found in one compound, designated "I". The radioactivity excreted into urine later than one hour after injection, consisted partly of Compound I and two additional components, and partly of polar, non-volatile material. Compound I was identified as leukotriene E4 by UV-spectroscopy and cochromatographies in three high performance liquid chromatography systems with synthetic reference compounds. A total of 13% of administered radioactivity was excreted in urine as leukotriene E4.
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