Artemotil
Artemotil (INN; also known as β-arteether),  is a fast acting blood schizonticide specifically indicated for the treatment of chloroquine-resistant Plasmodium falciparum malaria and cerebral malaria cases. It is a semi-synthetic derivative of artemisinin, a natural product of the Chinese plant Artemisia annua. It is currently only used as a second line drug in severe cases of malaria. References

Antimalarial agents
Ethers
Organic peroxides
Sesquiterpenes
Trioxanes
Ethoxy compounds
Heterocyclic compounds with 4 rings