two mercapturic acids , i.e. , n-acetyl-s- ( 1-cyano-2-hydroxyethyl ) -l-cysteine ( chema ) and n-acetyl-s- ( 2-hydroxyethyl ) -l-cysteine ( hema ) , were isolated from the urine of rats dosed with four successive doses of oxiranecarbonitrile ( glycidonitrile , gn ) , 5 mg/kg , a reactive metabolic intermediate of acrylonitrile ( an ) .
C0001047
mercapturic acids
C0010654
l-cysteine