Patent ID: 8906897

Claim:
A compound of general formula (I) wherein either one of R 1 and R 2 is —OH and the other is -Val-Gly-Ala-(D-Leu)-Ala-(D-Val) -Val-(D-Val)-Trp-(D-Leu)-X-(D-Leu)-Trp-(D-Leu)-Trp-NHCH 2 CH 2 OH, wherein X=Trp, or Phe, or Tyr (SEQ ID NO:3, gramicidin D), —N δ -cyclo-(Orn-Leu-D-Phe-Pro-Val) 2 (gramicidin S), -Arg-Gly-Asp-OH or -Arg-Arg-Trp-Trp-Arg-Phe-OH (SEQ ID NO:4); or R 1 and R 2 are each —NHCH 2 CH 2 OH, -GlyOMe, —NHCH(CH 2 OH)CH 2 OH, —NHCH 2 CH(OH)CH 2 OH, -Glu(ArgOMe)-ArgOMe, -HA, or -Arg-ArgOMe, wherein HA is the histamine moiety and Me n+ is Fe 2+ or Fe 3+ , or an isomer or a mixture of isomers thereof, or a pharmaceutically acceptable salt thereof.