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从长叶榧Torreyajackii叶中分得5种成分，经波谱分析及化学反应鉴定为二十烷醇（Ⅰ）、β-谷甾醇（Ⅱ）、反式璎珞柏酸（Ⅲ）、（＋）松脂素单甲醚（Ⅳ）和（＋）松脂素（Ⅴ），其中Ⅲ对人体DNA多聚酶β及白血病P388具有明显的抑制作用。
Five components were isolated from the leaves of Torreyajackii leaves and identified as eicosanol (Ⅰ), β-sitosterol (Ⅱ), trans-rhodopsin (Ⅲ), (+) rosin by spectroscopic analysis and chemical reaction Monomethyl ether (Ⅳ) and (+) pinoresin (Ⅴ), of which Ⅲ on human DNA polymerase β and leukemia P388 has a significant inhibitory effect.