SRT1720 is a specific synthetic activator of SIRT1 (silent mating type information regulation 2 homolog 1; Sirtuin 1),[13] PS341 (bortezomib) is a selective proteasome inhibitor that targets the 26S proteasome,[14] and UNC0631 is a potent inhibitor of histone methyltransferase G9a.[15] The inhibitory effect of these three compounds was further confirmed in three MO‐derived meningioma primary cell lines (Figure 6C, Figure S8A,B, Supporting Information). This evidence concerns the gene EHMT2 and meningioma.