A novel conjugate as a major metabolite of bromperidol in man

The major urine metabolites of the neuroleptic drug, bromperidol, after oral doses to rats and dogs are p-fluorophenylacetic acid and its glycine conjugate resulting from oxidative N-dealkylation. While the same metabolites were also detected in human urine, also present was a major unknown component representing 50% of the total urine metabolites, which apparently was not formed by rats and dogs to any extent. Mass spectroscopic investigations a substituent attached to the tertiary hydroxyl group. The mass spectrum of the metabolite after trifluoroacetylation was consistent with an O-glucofuranosiduronolactone conjugate of bromperidol.