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从落叶松（Ｌａｒｉｘｇｍｅｌｉｎｉ（Ｒｕｐｒ．）Ｒｕｐｒ．）和水杉（ＭｅｔａｓｅｑｕｏｉａｇｌｙｐｔｏｓｔｒｏｂｏｉｄｅｓＨｕｅｔＣｈｅｎｇ）针叶中首次分离出聚戊烯乙酸酯，其结构由１ＨＮＭＲ和１３ＣＮＭＲ鉴定为桦木聚戊烯醇型（ｂｅｔｕｌａｐｒｅｎｏｌ），其异戊烯基结构单元数（ｎ）与ＨＰＬＣ的ｌｏｇｔｒ线性关系研究确定ｎ在１０～２４间
Poly (pentenoyl acetate) was first isolated from the needles of Larixgmelini (Rupr.) Rupr. And Metasequoia glyptostroboides Huetheng. Its structure was identified as betulaprenol by 1HNMR and 13CNMR, The linear relationship between the number of pentenyl structural units (n) and HPLC logtr was confirmed by n between 10 ~ 24