Fisher, Christen & Sabol
Cephalosporins
 A cephalosporanic acid of the general formula ##STR1## wherein Y represents a hydrogen atom or a hydroxyl group, and the biologically acceptable salt and ester thereof. 
Mitsui Toatsu Chemicals, Inc.
C A
C07D A61P
inventional inventional
Hideaki Toshio Akira Nobuyuki Takuo
Sakai Suganuma Matsubara Fukazawa Nakano