Novel substances and process for their production

Abstract

Novel compounds are produced by the fermentation of a nutrient medium with the previously undescribed microorganism Streptomyces avermitilis. They may be isolated by solvent extraction and chromatographic fractionation techniques. The compounds, which are described generically as C-076 have significant parasiticidal activity. The compounds may be included in compositions for the oral or parenteral administration to animals for the treatment of parasitic infections.

Dependencies are inferred from the claim text.