1H-Cyclopenta[d][1,2,4]triazolo[1,5-a]pyrimidine-2-carboxamide, N-[2,5-dimethyl-4-[[1-oxo-3-(5-phenyl-1,3,4-oxadiazol-2-yl)propyl]amino]phenyl]-5,6,7,8-tetrahydro-8-oxo-

PDZ1i, also known as 113B7, is an inhibitor of MDA-9/Syntenin activity. PDZ1i radiosensitized GBM cells. PDZ1i inhibited crucial GBM signaling involving FAK and mutant EGFR, EGFRvIII, and abrogated gains in secreted proteases, MMP-2 and MMP-9, following radiation. In an in vivo glioma model, PDZ1i resulted in smaller, less invasive tumors and enhanced survival. When combined with radiation, survival gains exceeded radiotherapy alone.