methylnorethindron

例句：

1. 1.The compound was isolated from the petroleum ether fraction of the plant extract.
   该化合物是从植物提取物的石油醚部分分离出来的。
2. 2. Methylnorethindron is a potent anti-inflammatory agent that has shown promise in treating rheumatoid arthritis.
   甲基萘二烯是一种强效的抗炎剂，在治疗风湿性关节炎方面显示出了潜力。
3. 3. Due to its unique chemical structure, methylnorethindron exhibits high stability andresistance to degradation.
   由于其独特的化学结构，甲基萘二烯展现出高稳定性和抗降解能力。