Abstract: A fluorescent tracer for targeting tumors, comprises: at least one first fluorophore fluorescing in a range of wavelengths of between 700 and 1000 nm, a targeting assembly comprising at least two identical targeting molecules, and a cyclic oligopeptide: configured so as to define a mean plane defining a first upper face and a second lower face, comprising at least one first lysine amino acid residue on the second lower face, the targeting molecules being fixed to the first upper face of the mean plane, the fluorophore being fixed to the second lower face of the mean plane via a spacer arm connecting a carbon of the sequence of the at least three double bonds and the lysine amino acid residue of the oligopeptide.

Abstract: A fluorescent tracer for targeting tumors, comprises: at least one first fluorophore fluorescing in a range of wavelengths of between 700 and 1000 nm, a targeting assembly comprising at least two identical targeting molecules, and a cyclic oligopeptide: configured so as to define a mean plane defining a first upper face and a second lower face, comprising at least one first lysine amino acid residue on the second lower face, the targeting molecules being fixed to the first upper face of the mean plane, the fluorophore being fixed to the second lower face of the mean plane via a spacer arm connecting a carbon of the sequence of the at least three double bonds and the lysine amino acid residue of the oligopeptide.

Abstract: A fluorescent tracer comprises: a RAFT template, comprising the residues: Glycine-Proline-Lysine-Alanine-Lysine-Glycine-Proline-Lysine-Lysine-Lysine and having a mean plane defining an upper face having four lysine residues and a lower face having one lysine residue, four identical targeting molecules comprising the amino acids: Arginine-Glycine-Aspartic acid-Phenylalanine-Lysine (RGDKf), each of the molecules being fixed to a different lysine residue of the first upper face via an oxime bond, and a fluorophore S0456 fixed to the lower face of the mean plane via a spacer arm connecting the central carbon of the sequence of double bonds of the fluorophore and the lysine amino acid of the lower face of the decapeptide via an amide bond, the spacer arm being 5-(4-hydroxyphenyl)pentanoic acid.