Conjugate 9 was designed aiming to contain three functional moieties for targeted theranostics: i) the HAVAY peptide to target the cadherins overexpressed at cancer cells and thus acting as a drug carrier, ii) a Ru(II) complex with potential anticancer activity, and iii) a 67Ga-radiolabeled core (γ-emitter) for imaging purposes by single photon emission computed tomography (SPECT). The gene discussed is CDH17; the disease is cancer.