以下为句子列表：
英文: Objective: To study the best method for extraction of β-sitosterol in Oldenlandia diffusa (willd.
中文: 目的 :研究白花蛇舌草中β-谷甾醇的最佳提取工艺。
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英文: Determination of the content of yff-sitosterol and stigmasterol in phytosterols by UV -vis spectral methodThe UV-vis spectra of the complex compound of -sitosterol or stigmasterol with Deniges reagent was measured.
中文: 植物甾醇及其酯化衍生物的紫外可见分光光度法分析测定
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英文: Based on NMR spectra and other methods,they were identified as β-sitosterol ,bis(-ethylheptyl)phythalate ,phytol ,pinosylvin and -hydroxy-trans-stilbene--O-β-D-glucoside .
中文: 地上部分首次分离得到个化合物,运用波谱技术确定其结构分别为:β谷甾醇 ,邻苯二甲酸双(乙基庚基)酯 ,叶绿醇 ,银松素( ,二羟基二苯乙烯) , 羟基二苯乙烯OβD葡萄糖苷 。
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英文: Isoquinoline alkaloids of Litsea euosma were studied for the first time and compounds were obtained. The structure of these compounds were elucidated as boldine ,norisoboldine ,reticuline ,β-sitosterol and β-daucosterol by spectral analysis.
中文: 首次对清香木姜子(LitseaeuosmaW.W.Smith)中的异喹啉生物碱进行了研究,采用硅胶柱层析、重结晶等分离手段从中分离纯化得个化合物,通过现代波谱技术及与标准品对照等方法鉴定了它们的结构,包括 个异喹啉生物碱和β 谷甾醇及β 胡萝卜甙.
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英文: Results: . The three structures were identified as tricin , β-sitosterol and polyene .
中文: 果:.从生麦芽中分离得到的 个化合物分别为麦黄酮 、β-谷甾醇 、多元烯类化合物 。
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