cephalosporins containing side chains of n-methylthiotetrazole ( latamoxef , cefmenoxime , cefoperazone , cefotetan , cefamandole ) or methyl-thiadiazole ( cefazolin ) all caused the transient plasma appearance of vitamin k1 2,3-epoxide in response to a 10-mg intravenous dose of vitamin k1 , whereas two cephalosporins without a heterocyclic side chain ( cefotaxime and cefoxitin ) did not .
C0007549
cefmenoxime
C0007554
cefotaxime