从牛心番荔枝ＡｎｎｏｎａｒｅｔｉｃｕｌａｔａＬ．种子中分得两个番荔素（Ａｎｎｏｎａｃｅｏｕｓａｃｅｔｏｇｅｎｉｎ）：Ｓｑｕａｍｏｎｅ（１）和Ｉｓｏａｎｎｏｎａｒｅｔｉｃｉｎ（２）。经制备ＴＬＣ分离，将１和２的乙酰化物１ａ和２ａ分离得到两对２位差向异构体：２，４ｃｉｓＳｑｕａｍｏｎｅｄｉａｃｅｔａｔｅ（１ａ１），２，４ｔｒａｎｓＳｑｕａｍｏｎｅｄｉａｃｅｔａｔｅ（１ａ２），２，４ｃｉｓＩｓｏａｎｎｏｎａｒｅｔｉｃｉｎｄｉａｃｅｔａｔｅ（２ａ１）和２，４ｔｒａｎｓＩｓｏａｎｎｏｎａｒｅｔｉｃｉｎｄｉａｃｅｔａｔｅ（２ａ２）。其中２，４顺式体的１１和２１是新的番荔素成分。根据光谱（１Ｈ１ＨＣＯＳＹ，ＮＯＥ）数椐分析，阐明它们的结构和相对立体化学 From Soybean Annonareticulata L. Two annonaceous acetogenins were assigned to the seeds: Squamone (1) and Isoannonareticin (2). After separation by preparative TLC, 1 and 2 acetylates 1a and 2a were separated to obtain two pairs of 2-position epimers: 2,4-cis-Squamonediacetate (1a-1), 2,4-trans-Squamonediacetate (1a) 22),2,4cisIsoannonareticindiacetate(2a1) and 2,4transIsoannonareticindiacetate(2a2). Among them, the 1, 1-4 and cis-forms of 1-1 and 2-1 are new components of saponin. Analyze the structure and relative stereochemistry of the spectra (1H-1HCOSY, NOE) based on the analysis of data.