piperazin

例句：

1. 1. Piperazine is a common ingredient in anti-inflammatory drugs.
   哌嗪是抗炎症药物中常见的成分。
2. 2. The drug was effective in treating the patient's condition.
   这种药物对患者的病情有效。
3. 3. Piperazine has been used to treat malaria for many years.
   哌嗪被用于治疗疟疾多年。