1'-(substituted)ethyl-7- 2-(2-aminothiazol-4-yl)acetamido!-3- 1-(2- dimethylaminoethyl)-1H-tetrazol-5-yl!thio!methyl!ceph-3-em-4- carboxyla te derivatives having antibacterial utility

摘要

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.