Sm. Five of them are novel spiro-dienone derivatives of lignan by means of the spectral data and X-ray analysis. Their s从内南五味子的茎藤中分得七个化合物,经波谱和X衍射分析,其中五个系一类新型的螺环衍生物木脂素,分别定名为内南五味子素 、内南五味子素乙 、丙 、丁 及异内南五味子素(7)。