– IRES-J007 ia an improved IRES inhibitor that blocks IRES-hnRNP A1 binding; binds to a small pocket structure within the RRM-containing fragment of hnRNP A1 (UP1 fragment), inhibits cyclin D1 and c-MYC IRES activity to a greater extent compared with C11 (IRES-C11); significantly reduces tumor growth of GBM xenografts in mice, and markedly reduces the mRNA translational state of cyclin D1 and c-MYC transcripts combined with PP242.