A potent synthetic narcotic drug,C21H27NO,that is less addictive than morphine or heroin and is used as a substitute for these drugs in addiction treatment programs.

• 美沙酮一种有效的合成麻醉药，C21H27NO不象吗啡或海洛因那样容易让人上瘾，在戒毒治疗中被用作这些毒药的替代品。