Qiunoxalin

例句：

1. 1. This medicine is used to treat malaria.
   这种药物用于治疗疟疾。
2. 2.The patient took the medicine as prescribed by the doctor.
   病人按照医生的处方服用了这种药物。
3. 3. Qiunoxalin is a natural anti-malarial compound found in some plants.
   奎宁是一种天然的抗疟化合物，存在于某些植物中。