SUMMARYIdC-uniformly ring labeled 3,3', 5,5'-tetra-tert-butyIdiphenoquinone was synthesized from 2,6-di-tert-butylphenol. Chemical purity was established by mixed melting point, thin-layer and gas-liquid chromatography. Radiochemical purity was determined using autoradiography in conjunction with thin-layer chromatography and liquid scintillation techniques. Structure was confirmed by elemental analysis, ultraviolet-visible and itfrared spectroscopy and nuclear magnetic resonance.INTRODUCTION.
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