a narcotic alkaloid,C18H21NO4,related to codeine,used as an analgesic and a sedative chiefly in the form of its hydrochloride salt

 
  • 一种麻醉性的生物碱,C18H21NO4,和可待因有关的,用作止育药和镇静药,主要以其盐酸化物盐的形式存在
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