本文综合利用各种ＮＭＲ技术研究了紫菀中两个酚性化合物的结构及立体化学．利用相敏ＣＯＳＹ解析了相互重叠的强偶合体系，并结合分子力学计算讨论了化合物Ⅰ的构象． In this paper, a variety of NMR techniques were used to study the structure and stereochemistry of two phenolic compounds in Aster. The phase - sensitive COZY was used to analyze the strong coupling systems which overlap each other. The conformation of compound Ⅰ was discussed in combination with molecular mechanics calculation.