Urinary metabolites of vinyltoluene in the rat
Bergemalm-Rynell, K.; Steen, G.
Toxicology and Applied Pharmacology 62(1): 19-31
1982
ISSN/ISBN: 0041-008X PMID: 7064153 Document Number: 194526
o-Vinyltoluene, m-vinyltoluene and p-vinyltoluene were given i.p. to rats and urine was analyzed for acidic metabolites by gas chromatography mass spectrometry. Different derivatives were prepared and used to identify the structure of the metabolites. Different types (11) of metabolites were found, although all metabolites were not produced from each vinyltoluene isomer. The metabolites identified were: methylphenylethylene glycol, methylmandelic acid, methylphenylglyoxylic acid, hydroxymethylphenylethylene glycol, carboxyphenylethylene glycol, hydroxymethylphenylglyoxylic acid, methylbenzoylglycine, methylphenylacetylglycine, vinylbenzoylglycine, N-acetylcysteine conjugate of methylphenylethanol and glucuronide of methylphenylethylene glycol. Metabolites (> 90%) recovered were excreted during the 1st 24 h. For the sum of all metabolites, there was an approximately linear relation between given dose and recovered amount of metabolites. Repeated daily administration was not followed by any appreciable increase in metabolite excretion and no enzyme induction phenomenon was apparent.