Antonelli, Terry & Wands
1 '-(substituted)ethyl-7.beta.-[2-(2-aminothiazol-4-yl)acetamido]-3-[[[1-(2 -dimethylaminoethyl)-1H-tetrazol-5-yl]thio]methyl]ceph-3-em-4-carboxylate derivatives having antibacterial utility
 A compound of the formula: ##STR1## wherein R is 2-methylpropyl, 2,2-dimethylpropyl, 1-ethylpropyl, 1-methylbutyl, 2-methylbutyl, 3-methylbutyl, n-pentyl, an alkyl group of 6 or 7 carbon atoms, or an alkenyl group of 2 to 7 carbon atoms, or a pharmaceutically acceptable salt thereof and processes for preparing the same are provided. The compound can orally be applied as antibiotics having improved absorbability. 
Takeda Chemical Industries, Ltd.
C C C A
C07D C07C C07D A61P
inventional inventional inventional inventional
Kunio Mitsuo Tomoyuki
Takanohashi Numata Fujii