Complex sentence: Demeclocycline (marketed as Declomycin, Declostatin, and Ledermycin) is a tetracycline antibiotic derived from a strain of "Streptomyces aureofaciens".
Split into simpler sentences: Demeclocycline (marketed as Declomycin, Declostatin and Ledermycin) is a tetracycline antibiotic. It is derived from a strain of "Streptomyces aureofaciens".