some ( alpha-hydrazinobenzyl ) cephalosporins , i ( r = me , ch2oac , cl ) and ii ( r = me , ch2oac ) , structurally related ( formula ; see text ) to cephalexin , cephaloglycin , and cefaclor have been prepared and evaluated in vitro for their antimicrobial activity .
C0007716
cephalexin
C0007721
cephaloglycin