3-dione-bis-(N-methyl - thiosemicarba-zone)-iodide (p-TPA-DTS) was synthesized by methylation of aminoethylbenzene
followed by propionylation
nitrosation
reaction with methylth iosemicarbazide and quarternization. Tc-99m-complex of this compound was prepared by stannous chloride reduction of sodium pertechnetate in aqueous at pH 3. Tc-99m-p-TPA-DTS possessed a clear myocardial image and rapid hepatocellular transit in rabbits.
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