奎宁

例句：

1. 1. The medicine contains quinine, which is used to treat malaria.
   这种药物含有奎宁，用于治疗疟疾。
2. 2. The patient was given quinine to help combat the symptoms of malaria.
   病人被给予奎宁以帮助对抗疟疾的症状。
3. 3.Quinine is an important antimalarial drug that is extracted from cinchona bark.
   奎宁是一种重要的抗疟药，是从金鸡纳树皮中提取的。