Figure 1.

Molecular structure of the αvβ3 integrin ligand cyclo(DKP‐RGD) (1) and its analog cyclo(DKP‐RβAD) (3), alongside with their relative sulfo‐cyanine5 (sCy5) conjugates cyclo(DKP‐RGD)‐sCy5 (2) and cyclo(DKP‐RβAD)‐sCy5 (4). Data of inhibition of biotinylated vitronectin binding to the αvβ3 receptor are shown.