title: Tetronomycin, a novel polyether of unusual structure.
abstract: Tetronomycin, C34H50O8, isolated from a strain of Streptomyces sp. nov. represents a novel polycyclic ionophore polyether. The crystal structure and absolute configuration were established by X-ray analysis of the mono-O-acetyltetronomycin silver salt. Tetronomycin is the first metabolic polyether which contains a tetronic acid moiety instead of the essential carboxylic acid function. A trisubstituted cyclohexane ring and an interesting molecular conformation of the silver salt represent additional unique structural features. Extensive NMR-studies enabled the assignment of chemical shifts and the correlation of the proton and carbon signals. Tetronomycin exhibits activity against Gram-positive bacteria.
mesh_terms: D000900:Anti-Bacterial Agents / Q000302:isolation & purification* / Q000494:pharmacology; D055598:Chemical Phenomena; D002621:Chemistry; D004987:Ethers / Q000302:isolation & purification / Q000494:pharmacology; D005285:Fermentation; D009682:Magnetic Resonance Spectroscopy; D008826:Microbial Sensitivity Tests; D013302:Streptomyces / Q000378:metabolism*
chemical_list: D000900:Anti-Bacterial Agents; D004987:Ethers; C034612:tetronomycin