a newly developed macrolide clarithromycin ( te-031 , a-56268 ) , with antibacterial spectrum and antibacterial activity nearly equal to those of erythromycin ( em ) , shows beneficial characteristics such as a higher blood level , higher recovery rate in urine , and better penetration into each tissue than conventional macrolides ( mls ) .
C0055856
clarithromycin
C0014806
erythromycin