title: Letter: The structure of A23187, a divalent cation ionophore.
mesh_terms: D000900:Anti-Bacterial Agents; D002264:Carboxylic Acids; D055598:Chemical Phenomena; D002621:Chemistry; D013302:Streptomyces / Q000378:metabolism
chemical_list: D000900:Anti-Bacterial Agents; D002264:Carboxylic Acids