| abstract |
A compound represented by the formula: (I) wherein Acyl represents an acyl group which can be used in the field of β-lactams; T represents S, SO or O; the group represented by the formula: (Q) represents a heterocyclic group which may be substituted by a substituent other than '-Y1-Ar1-Y2-R1' and has a cationic N atom in the ring; Y1 and Y2 independently represent 1) a single bond, 2) a heteroatom-containing group selected from the group consisting of -NR2, -CO-, -NR2CO-, -CONR2-, -NR2CONR3-, -NR2SO2-, -SO2NR2-, -NR2SO2NR3- (where R2 and R3 independently represent a hydrogen or a lower alkly), -O-, -S-, -SO- and -SO2-, or 3) a lower alkylene or lower alkenylene group which may be bound through a heteroatom-containing group as listed in the item 2); Ar1 represents a single bond, a carbocyclic group which may be substituted or a haterocyclic group which may be substituted; R1 represents -CONHCN, -C(OH)=NCN or -COOH or a biologically equivalent acidic group thereof; and the wavy line means a cis, trans or a mixture thereof. |