Fisher, Christen & Sabol
Quinolinecarboxylic acid substituted penicillins and pharmaceutical compositions containing the same
 A penicillanic acid of the general formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 each represent a hydrogen atom or a lower alkyl group, provided that R.sup.1, R.sup.2 and R.sup.3 do not simultaneously represent a hydrogen atom, or a biologically acceptable salt thereof. 
Mitsui Toatsu Chemicals, Incorporated
C C
C07D C07D
inventional inventional
Toshio Takuo Hideaki Akira
Suganuma Nakano Sakai Matsubara