Cover; Copyright Page; Preface; TOCContents; CHChapter 1. Recent Advances in the Chemistry and Biology of Retinoids; CHChapter 2. Semi-synthetic Derivatives of Erythromycin; CHChapter 3. Biological Significance of Manganese in Mammalian Systems; CHChapter 4. Approach to the Chemotopography of the Digitalis Recognition Matrix in Na+/K+-transporting ATPase as a Step in the Rational Design of New Inotropic Steroids; CHChapter 5. Amidines and Guanidines in Medicinal Chemistry; CHChapter 6. Inhibitors of Enkephalin-degrading Enzymes as Potential Therapeutic Agents; IDXSubject Index