日本菊花螺Siphonariajaponia化学成分的研究（Ⅱ）

Studies on the Chemical Constituents of the Marine Mollusc, Siphonaria japoniaⅡ)

从海洋软体动物日本菊花螺Ｓｉｐｈｏｎａｒｉａｊａｐｏｎｉａ中分离得到２个聚丙酸酯类衍生物１和２．利用ＨＭＢｃ所观察到的远程Ｃ／Ｈ相关阐明１的结构，并通过波谱分析推导化合物２的结构。

Two polypropionate derivatives 1 and 2 have been isolated from the marinemoll use of Siphonaria japonia. Compound 1,reported previously,was further studiedby long range C/H correlation achieved by the use of the HMBC sequence。The struc-ture of compound 2 was elucidated with the spectral data of IR,UV,MS,￣1H and￣(13)C NMR。