GSK3368715 is an orally active, reversible, and S-adenosyl-L-methionine (SAM) uncompetitive type I protein arginine methyltransferases (PRMTs) inhibitor (IC50s: 3.1 nM (PRMT1), 48 nM (PRMT3), 1148 nM (PRMT4), 5.7 nM (PRMT6), 1.7 nM (PRMT8)). It has strong anti-cancer activity.

GSK3368715, a potent inhibitor of type I protein arginine methyltransferases (PRMT), could inhibit PRMT1, 3, 4, 6 and 8 with Kiapp vaules ranging from 1.5 to 81 nM.

GSK3368715 dihydrochloride (EPZ019997 dihydrochloride) is an orally active and potent inhibitor of type I protein arginine methyltransferases (PRMTs) with anticancer and antitumor activity, inhibiting PRMT1, PRMT3, PRMT4, PRMT6, and PRMT8, and can be used to study advanced solid tumors.

GSK3368715, a first-in-class, orally active, potent, and selective SAM-noncompetitive inhibitor of Type I Protein Arginine Methyltransferases (PRMTs), exhibits anti-tumor efficacy across multiple cancer models and alters exon usage with IC50 values in the lower nM range. It synergizes with GSK3326595 (Type II inhibitor) (Axon 3750) to inhibit tumor growth.