(Rac)-ACT-451840

(Rac)-ACT-451840 is an isomer of ACT-451840 that exhibits significant antimalarial effects. (Rac)-ACT-451840 exhibits significant antimalarial activity against P. berghei-infected mice at a dose of 20 mg/kg (ED90=13 mg/kg), and has an inhibitory effect at a dose of 300 mg/kg. The ED90 of (Rac)-ACT-451840 in the P. falciparum humanized immunodeficient mouse model is 3.7 mg/kg. (Rac)-ACT-451840 is similar to artemisinin, with a rapid onset of action but requires repeated high doses.