The Natural Product Essramycin and Three of Its Isomers Are Devoid of Antibacterial Activity

The Natural Product Essramycin and Three of Its Isomers Are Devoid of Antibacterial Activity Essramycin: A First Triazolopyrimidine Antibiotic Isolated from Nature† Synthesis of Essramycin and Comparison of Its Antibacterial Activity New Antibacterial Bagremycins F and G from the Marine-Derived Streptomyces sp. ZZ745 Discovery, Structural Optimization, and Mode of Action of Essramycin Alkaloid and Its Derivatives as Anti-Tobacco Mosaic Virus and Anti-Phytopathogenic Fungus Agents Structure-activity studies of irumamycin type macrolides from Streptomyces sp. INA-Ac-5812 Hunanamycin A, an Antibiotic from a Marine-Derived <i>Bacillus hunanensis</i> Marine Bacteria. IX. Dihydrophencomycin Methyl Ester, a New Phenazine Derivative from a Marine Streptomycetet. The electrospray ionization - mass spectra of erythromycin a obtained from a marine &lt;i&gt; Streptomyces&lt;/i&gt; sp. mutant Four New Antibacterial Xanthones from the Marine-Derived Actinomycetes Streptomyces caelestis