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Abstract Pharmaceutical CHEMICAL STUDIES t THE FI1D ___ r OF THE KETOALCOHQI HORMONES Natural and modified corticosteroids are highly potent igs and usually administered in minute doses of about 1 mg. Less. The quantitative analysis o± these drugs in their aceutical preparations requires, therefore, special miques, highly sensitive and easy to adopt for routine Lysis. The work presented in this thesis is mainly concerned ;h developing new methods of analysis of these corticosteroids nieet with the general requirements of the pharmaceutical yst in the control laboratories. —.‘.i The thesis comprises six main parts. PART ONE I This is the theoretical part and is divided into three ers. ter I: Discusses the structure of corticosteroids. er II: Deals with the application of pbrsical methods includ— 1traviolet and. infrared spectroscopy to steroid chemistry. |