A new phenanthrene, 2,6-dihydroxy-5,8-dimethoxyphenanthrene (1), was isolated from Pleione praecox. The structure of the new compound was determined on the basis of NMR (1D and 2D) and HR-ESI-MS data. The new compound was also evaluated for its α-glucosidase inhibitory activity. Compared with the positive control acarbose, the new compound exhibited appreciable effect.

中文翻译：

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一种来自Pleione praecox的新菲衍生物

从Pleione praecox中分离出新的菲2,6-二羟基-5,8-二甲氧基菲（1）。根据NMR（1D和2D）和HR-ESI-MS数据确定新化合物的结构。还评估了该新化合物的α-葡萄糖苷酶抑制活性。与阳性对照阿卡波糖相比，新化合物显示出明显的效果。