Cephalosporin compounds

Abstract

A cephalosporin compound of the formula: ##STR1## wherein R.sup.1 is a protected or unprotected amino group; either one of R.sup.2 and R.sup.3 is a substituted or unsubstituted lower alkylthio group; sulfamoyl group; a lower alkylsulfonyl group; sulfo group; a substituted or unsubstituted amino group; a lower alkyl group; a lower alkyl group having a substituent selected from a lower alkylthio group, amino group and an acylamino group; a halogen atom; carboxy group or a lower alkoxy group; and the other one of R.sup.2 and R.sup.3 is hydrogen atom; carbamoyl group; a substituted or unsubstituted amino group; a lower alkyl group or a hydroxy-lower alkyl group; or R.sup.2 and R.sup.3 are combined together to form a lower alkylene group; or a salt thereof and processes for preparing the same are disclosed. The cephalosporin compound (I) is useful as an antimicrobial agent.

Dependencies are inferred from the claim text.