IDH1 and oligodendroglioma: In comparison VI (Figure 1A) (n = 7 IDH1-mut glioblastoma versus n = 29 IDH1-mut oligodendroglioma), we found 19 significant metabolites in the 2-tailed t test (Tables 1 and 2), including sarcosine, glutamate, taurine, AMP, uridine, phenylalanine, lactate, glutathione, formate, and citrate.