piperazine

例句：

1. 1.This compound is used in medicine to treatpain.
   这种化合物用于医学中治疗疼痛。
2. 2. Piperazine has a bitter taste andcan cause nausea.
   哌嗪有苦味，可能导致恶心。
3. 3. The drugwas developed to relieve symptomsof malaria.
   该药物被开发出来以缓解疟疾的症状。