Main targets of novel drugs being investigated in BCG-unresponsive NMIBC. TPH, Tryptophan; KYN, Kynurenine; IFNα2b, Interferon α2b; DC, Dendritic Cell; PD1, Programmed cell Death protein 1; PD-L1, Programmed Death-Ligand 1; mAb, monoclonal Antibody; GM-CSF, Granulocyte-Macrophage Colony-Stimulating Factor; FGFR, Fibroblast Growth Factor Receptor; TKI, Tyrosine Kinase Inhibitors; IDO1, Indoleamine 2,3-Dioxygenase 1; IL-15Rα, Interleukin-15 receptor α; MHCII, Major Histocompatibility Complex Class II; TCR, T Cell Receptor; TLR7, Toll-like Receptor 7; EpCAM, Epithelial Cell Adhesion Molecule; CD3, Cluster of Differentiation 3.