According to synthesis and isolation of US patent, its purity cannot meet the requirement of pharmacopoeia.

由于美国专利合成与提纯方法过于简单且产率较低，纯度达不到医药级纯度。

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According to synthesis and isolation of US patent, its purity cannot meet the requirement of pharmacopoeia.

由于美国专利合成与提纯方法过于简单且产率较低，纯度达不到医药级纯度。

youdao