DSM265 is a long-duration inhibitor of P. falciparum dihydroorotate dehydrogenase ( Pf DHODH ) with an IC 50 of 8.9 nM. DSM265 can also inhibit the growth of Pf 3D7 parasites with an EC 50 of 4.3 nM In Vivo DSM265 (0.5 to 75 mg/kg; Oral administration; twice daily; for 4 days; NOD- scid IL-2Rγ (NSG) mice) has potent in vivo antimalarial activity with 90% effective dose ( ED 90 ) of 3 mg/kg per day (1.5 mg/kg twice daily). The maximum rate of parasite killing occurred at and above a dose of 13 mg/kg per day (6.4 mg/kg twice daily). DSM265 has moderate terminal elimination half-life (t 1/2 ) of 2-4 hours for mice (0.5 to 75 mg/kg, oral). MCE has not independently confirmed the accuracy of these methods. They are for reference only. Animal Model: NOD- scid IL-2Rγ (NSG) mice (23-36 g)Dosage: 0.5 to 75 mg/kg Administration: Oral administration; twice daily; for 4 days Result: Had potent antimalarial activity with 90% effective dose ( ED 90 ) of 3 mg/kg per day (1.5 mg/kg twice daily). Form:Solid IC50& Target:IC50: 8.9 nM ( Pf DHODH), EC50: 4.3 nM ( P. falciparum 3D7 parasites)