TF and neoplasm: developed ethylenediamine‐grafted γ‐CDs cross‐linked with gelatine, highly loaded with betulinic acid (BA) through CD cavity inclusion.[255] These nanogels are capable of recognizing tumor cells via the RGD sequence grafted on gelatine, leading to tumor inhibition.[255] Transferrin (TfR) receptors overexpressed in certain tumors can also be targeted using human transferrin (Tf) to enhance nanogel internalization by tumor cells.[143]