Patent ID: 7854918

Claim:
A medical composition, comprising: a peptide labeled with a metal and a basic organic compound acceptable as a pharmaceutical additive wherein the basic organic compound is a basic amino acid or a basic compound having an imidazole ring, wherein the peptide labeled with a metal is selected from the group consisting of N-formyl-Nle-Leu-Phe-Nle-Tyr-Lys(NH 2 )-ε(-Ser-Cys-Gly-Asn) (SEQ ID NO:1), N-formyl-Nle-Leu-Phe-Nle-Tyr-Lys(NH 2 )-ε(-Ser-Cys-Gly-Asp) (SEQ ID NO:2), N-formyl-Nle-Leu-Phe-Nle-Tyr-Lys-ε(-Ser-Cys-Asp-Asp) (SEQ ID NO:3), N-formyl-Nle-Leu-Phe-Nle-Tyr-Lys(NH 2 )-ε(-Ser-D-Arg-Asp-Cys-Asp-Asp) (SEQ ID NO:4), N-formyl-Nle-Leu-Phe-Nle-Tyr-Lys(NH 2 )-e(-Ser-D-Arg-diethylenetriaminepentaacetic acid (DTPA)) (SEQ ID NO:5), N-formyl-Met-Leu-Phe-Lys-ε(-Asp-Asp-mercaptoacetyl) (SEQ ID NO:7), N-formyl-Met-Leu-Phe-Lys-ε(-Gly-Asp-mercaptoacetyl) (SEQ ID NO:8), and N-formyl-Met-Leu-Phe-Lys-ε(-Gly-Gly-mercaptoacetyl) (SEQ ID NO:9).