SSTR2 and neoplasm: designed a novel dual‐targeting nanocarrier by incorporating octreotide‐peptide and magnetic Fe3O4 nanoparticles into the surface of oleanolic acid‐loaded liposomes.[218] In vivo biodistribution studies were performed in somatostatin receptor 2 positive S180 tumor‐bearing mice and showed accumulation in the tumor, compared to free oleanolic acid, untargeted liposomes, and targeted liposomes in the absence of a magnetic field.