Cephalosporin derivatives

Abstract

Novel cephem derivatives represented by the general formula ##STR1## in which the Acyl substituent is a group of the formula ##STR2## wherein Ar is a lipophilic optionally substituted phenyl, naphthyl, pyridyl or benzthiazolyl group; R.sup.1 is selected from certain optionally substituted aliphatic, aromatic, arylaliphatic or sugar moieties and R.sup.2 and R.sup.3 are each independently hydrogen, alkyl or aminoalkylcarbonylamino are gram-positive antibacterial agents, especially useful in the treatment of infectious diseases caused by methicillin-resistant Staphylococcus aureus (MRSA).

Dependencies are inferred from the claim text.