Alborixin, a new antibiotic ionophore: isolation, structure, physical and chemical properties.

Alborixin, a polycyclic polyether ionophorous antibiotic, active against Gram-positive bacteria and fungi, was isolated from cultures of a strain of Streptomyces albus. The isolation, structure and physiochemical properties of this antibiotic are reported. Some derivatives have been prepared and their structures and properties are also described in this paper.