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 .
C0007714
cephacetrile
C0007735
cephalothin