[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][N][Branch2][Ring2][Ring2][C][C][N][Ring1][=Branch1][C][C][C][N][C][C][N][Branch1][Branch1][C][C][Ring1][=Branch1][C][=C][C][=C][C][=Branch1][#Branch2][=C][C][Ring1][=Branch1][=N][C][=C][Ring1][#Branch2][Cl][C][=C][C][=C][C][=Branch1][#Branch2][=C][C][Ring1][=Branch1][=N][C][=C][Ring1][#Branch2][Cl]"}, {"from": "gpt", "value": "The molecule is an antimalarial agent first synthesized in the 1960's and used throughout China. Its use declined in the 1980's as piperaquine resistant strains of *Plasmodium falciparum* appeared and artemisinin derivatives became available. It has come back into use in combination with the artemisinin derivative [DB11638] as part of the combination product Eurartesim. Eurartesim was first authorized for market by the European Medicines Agency in October 2011."}]