Patent ID: 8636978

Claim:
A compound of formula I (SEQ ID NO:1): or a pharmaceutically-acceptable salt thereof; wherein: R 1 is (CH 2 ) 4 NR 12 R 14 ; R 2 is hydrogen or C 1 -C 6 alkyl; R 3 is CH 2 C(═O)NR 12 R 15 ; R 4 is hydrogen or C 1 -C 6 alkyl; R 5 is hydrogen or C 1 -C 6 alkyl; R 6 is hydrogen or C 1 -C 6 alkyl; R 7 is (CH 2 ) 3 NHC(NR 12 R 14 )(═N + R 12 R 16 ); R 8 is hydrogen or C 1 -C 6 alkyl; R 9 is hydrogen or C 1 -C 6 alkyl; R 10 is hydrogen or C 1 -C 6 alkyl; R 11 is hydrogen or C 1 -C 6 alkyl; each R 12 is, independently, hydrogen or C 1 -C 6 alkyl; R 13 is hydrogen, C 1 -C 6 alkyl, or -(L) n -sm; L is a linking moiety; n is 0 or 1; sm is a support medium; R 14 is hydrogen, C 1 -C 6 alkyl, amino protecting group, or a diagnostic moiety that is a fluorophore, a non-metallic isotope, an optical reporter, a boron neutron absorber, a paramagnetic metal ion, a ferromagnetic metal, a gamma-emitting radioisotope, a positron-emitting radioisotope, or an x-ray absorber; R 15 is hydrogen, C 1 -C 6 alkyl, or amino protecting group; and R 16 is hydrogen, C 1 -C 6 alkyl, or a guanidino-protecting group.