| abstract |
A compound of formula (I) or a pharmaceutically or veterinarily acceptable salt thereof for the inhibition of activity of bacterial PDF enzyme: wherein A represents a group of formula (IA) or (IB) and wherein R<SUB>1 </SUB>is hydrogen, R<SUB>2 </SUB>is n-butyl, benzyl or cyclopentylmethyl, R<SUB>3 </SUB>is hydrogen, R<SUB>4 </SUB>is tert-butyl, iso-butyl, benzyl or methyl, R<SUB>5 </SUB>is hydrogen or methyl and R<SUB>6 </SUB>is methyl. |