Fisher, Christen & Sabol
Cephalosporins
 A cephalosporanic acid of the general formula ##STR1## wherein A represents ##STR2## and the pharmaceutically acceptable salt and ester thereof. 
Mitsui Toatsu Chemicals, Inc.
C A
C07D A61P
inventional inventional
Hideaki Takuo Toshio Makoto Akira
Sakai Nakano Suganuma Odate Matsubara