sonic extracts of h. influenzae containing beta-lactamase were assayed for the rates of hydrolysis of benzylpenicillin , ampicillin , cloxacillin , cephacetrile , cefazolin , cefamandole , cephalothin , cephaloridine , cephaloglycin , and cefaclor .
C0030827
benzylpenicillin
C0002680
ampicillin