CL307-24I, the main component of the CL307-24 complex produced by Saccharopolyspora aurantiaca sp. nov., was found to be a potent inhibitor of yeast mitochondrial ATPase. CL307-24I displayed a high degree of activity towards some coryneform bacteria and also has been shown to possess an insecticidal activity. Its biological and physico-chemical properties clearly distinguish it from previously known ATPase inhibitors.
