title: Cephabacin M1-6, new 7-methoxycephem antibiotics of bacterial origin. II. Isolation, characterization and structural determination.
abstract: Six components of new cephem antibiotics, cephabacin M1-6, were isolated from the culture filtrate of Xanthomonas lactamgena YK-431 by various types of column chromatographies and preparative reverse-phase HPLC. Their structures were determined by spectroscopic analyses and degradation studies. They consist of 7-methoxydeacetylcephalosporin C as a nucleus and a tri- to heptapeptide including a new amino acid, which is bound at the 3-position with an ester bond.
mesh_terms: D000900:Anti-Bacterial Agents / Q000302:isolation & purification*; D002511:Cephalosporins / Q000302:isolation & purification*; D055598:Chemical Phenomena; D002621:Chemistry; D008968:Molecular Conformation; D013053:Spectrophotometry
chemical_list: D000900:Anti-Bacterial Agents; D002511:Cephalosporins; C044529:cephabacins