7-[Amino or carboxy substituted oxyimino]-3-[amino or alkoxy substituted heterocyclic thiomethyl] cephalosporin derivatives

Abstract

Bacteriostatic cephem compounds and processes for preparing same having the formula: ##STR1## wherein R.sup.1 is amino or protected amino, R.sup.2 is lower alkyl, amino(lower)alkyl, protected amino(lower)alkyl, hydroxy(lower)alkyl, protected hydroxy(lower)alkyl, lower alkylthio(lower)alkyl, carboxy(lower)alkyl, esterified carbony(lower)alkyl, (C.sub.3 -C.sub.8)cycloalkyl, lower alkenyl or lower alkynyl, R.sup.3 is a heterocyclic group substituted with amino(lower)alkyl, protected amino(lower)alkyl, hydroxy(lower)alkyl or both amino and lower alkyl, R.sup.4 is carboxy or protected carboxy, provided that R.sup.3 is a heterocyclic group substituted with hydroxy(lower)alkyl or both amino and lower alkyl, when R.sup.2 is lower alkyl, and its pharmaceutically acceptable salt.

Dependencies are inferred from the claim text.