because of differences in antimicrobial activities , the cephalosporins could be divided into three subgroups for purposes of susceptibility testing : one subgroup includes the majority of cephalosporins and may be represented by tests with cephalothin , the second subgroup inclues three active parenteral drugs ( cephamandole , cefuroxime , and bl-s786 ) and may be represented by tests with cefuroxime , and the third subgroup consists of cefoxitin , a cephamycin with a unique broad spectrum of activity .
C0007557
cefoxitin
C0007736
cephamycin