An antibacterial complex comprising a nucleic acid sequence and at least one delivery moiety, wherein: a) the nucleic acid sequence comprises the sequence of a native cellular binding site for a bacterial transcription factor; and b) the delivery moiety is represented by Formula: wherein: r is an integer from 2 to 24; R 8, R 9 and R 10 are the same or different and are each selected from hydrogen; C 1-4 alkyl optionally substituted with one or more fluorine atoms: C 1-4 alkoxy optionally substituted with one or more fluorine atoms; nitro; amino; mono- and di-C 1-4 alkylamino; halogen, phenyl-C 1-2 alkyl wherein the phenyl moiety is optionally substituted with one or two methoxy, methyl or halogen substituents; ureido and guanidinyl; or R 9 and R 10 link together to form an alkylene chain (CH 2) w wherein w is 3 to 5; and R 8a, R 9a and R 10a are the same or different and are each selected from hydrogen; C 1-4 alkyl optionally substituted with one or more fluorine atoms: C 1-4 alkoxy optionally substituted with one or more fluorine atoms; nitro; amino; mono- and di-C 1-4 alkylamino; halogen, phenyl-C 1-2 alkyl wherein the phenyl moiety is optionally substituted with one or two methoxy, methyl or halogen substituents; ureido and guanidinyl; or R 9a and R 10a link together to form an alkylene chain (CH 2) w wherein w is 3 to 5; provided that: (i) when R 10 and R 10a are both hydrogen or are both methyl, and R 9 and R 9a are both hydrogen, then at least one of R 8 and R 8a is other than hydrogen, amino or dimethylamino; and (ii) when R 9 and R 10 link together to form an alkylene chain (CH 2) w wherein w is 4 and R 9a and R 10a link together to form an alkylene chain (CH 2) w wherein w is 4, then at least one of R 8 and R 8a is other than amino. a) the nucleic acid sequence comprises the sequence of a native cellular binding site for a bacterial transcription factor; and b) the delivery moiety is represented by Formula: wherein: r is an integer from 2 to 24; R 8, R 9 and R 10 are the same or different and are each selected from hydrogen; C 1-4 alkyl optionally substituted with one or more fluorine atoms: C 1-4 alkoxy optionally substituted with one or more fluorine atoms; nitro; amino; mono- and di-C 1-4 alkylamino; halogen, phenyl-C 1-2 alkyl wherein the phenyl moiety is optionally substituted with one or two methoxy, methyl or halogen substituents; ureido and guanidinyl; or R 9 and R 10 link together to form an alkylene chain (CH 2) w wherein w is 3 to 5; and R 8a, R 9a and R 10a are the same or different and are each selected from hydrogen; C 1-4 alkyl optionally substituted with one or more fluorine atoms: C 1-4 alkoxy optionally substituted with one or more fluorine atoms; nitro; amino; mono- and di-C 1-4 alkylamino; halogen, phenyl-C 1-2 alkyl wherein the phenyl moiety is optionally substituted with one or two methoxy, methyl or halogen substituents; ureido and guanidinyl; or R 9a and R 10a link together to form an alkylene chain (CH 2) w wherein w is 3 to 5; provided that: (i) when R 10 and R 10a are both hydrogen or are both methyl, and R 9 and R 9a are both hydrogen, then at least one of R 8 and R 8a is other than hydrogen, amino or dimethylamino; and (ii) when R 9 and R 10 link together to form an alkylene chain (CH 2) w wherein w is 4 and R 9a and R 10a link together to form an alkylene chain (CH 2) w wherein w is 4, then at least one of R 8 and R 8a is other than amino. r is an integer from 2 to 24; R 8, R 9 and R 10 are the same or different and are each selected from hydrogen; C 1-4 alkyl optionally substituted with one or more fluorine atoms: C 1-4 alkoxy optionally substituted with one or more fluorine atoms; nitro; amino; mono- and di-C 1-4 alkylamino; halogen, phenyl-C 1-2 alkyl wherein the phenyl moiety is optionally substituted with one or two methoxy, methyl or halogen substituents; ureido and guanidinyl; or R 9 and R 10 link together to form an alkylene chain (CH 2) w wherein w is 3 to 5; and R 8a, R 9a and R 10a are the same or different and are each selected from hydrogen; C 1-4 alkyl optionally substituted with one or more fluorine atoms: C 1-4 alkoxy optionally substituted with one or more fluorine atoms; nitro; amino; mono- and di-C 1-4 alkylamino; halogen, phenyl-C 1-2 alkyl wherein the phenyl moiety is optionally substituted with one or two methoxy, methyl or halogen substituents; ureido and guanidinyl; or R 9a and R 10a link together to form an alkylene chain (CH 2) w wherein w is 3 to 5; provided that: (i) when R 10 and R 10a are both hydrogen or are both methyl, and R 9 and R 9a are both hydrogen, then at least one of R 8 and R 8a is other than hydrogen, amino or dimethylamino; and (ii) when R 9 and R 10 link together to form an alkylene chain (CH 2) w wherein w is 4 and R 9a and R 10a link together to form an alkylene chain (CH 2) w wherein w is 4, then at least one of R 8 and R 8a is other than amino. (i) when R 10 and R 10a are both hydrogen or are both methyl, and R 9 and R 9a are both hydrogen, then at least one of R 8 and R 8a is other than hydrogen, amino or dimethylamino; and (ii) when R 9 and R 10 link together to form an alkylene chain (CH 2) w wherein w is 4 and R 9a and R 10a link together to form an alkylene chain (CH 2) w wherein w is 4, then at least one of R 8 and R 8a is other than amino.