【摘要】 从四川省木里县采集的云南红豆杉 Ｔａｘｕｓ ｙｕｎｎａｎｅｎｓｉｓ的树皮中分得 ３个紫杉烷类似物，经解析其^１Ｈ，^１３ＣＮＭＲ、ＥＩＦＡＢ ＭＳ谱及ＤＥＰＴ实验证明此３个类似物为１－β－ｈｖｄｒｏｘｙ－ｂａｃｃａｔｉｎＩ（Ｉ）、 １０－ｄｅａｃｅｔｙｌｔａｘｏｌ（Ⅱ）、 ７， ９－ｄｉｄｅａｃｅｔｙｌｂａｃｃａｔｉｎ Ⅵ（ Ⅲ）。此 ３个化合物存在于红豆杉属的其它植物中，但首次从云南红豆杉中分出。更多还原

【Abstract】 Three taxane diterpenoids were isolated from the bark of Taxus yunnanensis Cheng et L. K. Fu collected in Molin county, Sichuan Province. Their chemical structures were elucidated as 1-β- hydroxy baccatin I （I ）; 10-deacetyltaxol（Ⅱ ） ; and 7,9-dideacetyl baccatin Ⅳ （Ⅲ） by ¹HNMR, ¹³CNMR, EI and FABMS as well as DEPT spectrum. These compounds were isolated from T. yunnanensis Cheng et L. K. Fu for the first time even though they also existed in other species of Taxus L.更多还原