The essential oil and extractum are extracted from its stem, leaf and flower by steam distillation and solvent extraction. According to the analysis, it contains 0.1003% essential oil and 0.74% extraction in average.
英
美
释义
采其当年生茎、叶、花分别用水蒸馏法和萃取两种方法提取精油和浸膏;平均得率精油为0.;1003%25;浸膏为0
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