r-3746 inhibited the majority of hemolytic streptococci ( groups a , b , c , f , and g ) and streptococcus pneumoniae at less than 0.06 micrograms/ml , which was comparable to the activity of amoxicillin , 2- to 8-fold more active than cefixime , and 16- to 64-fold more active than cefaclor and cephalexin .
C0007537
cefaclor
C0007716
cephalexin