胆甾烯酮

For utilization the untouchable skeleton of sapogenin, we started from tigogenin , through oxidation , opening of E, F ring, turning...

于是我们从剑麻皂甙元出发，经七步反应得到胆甾-3，26-二乙酸酯-16烯-22酮，总收率35.9％。

The steroids of cholest 4 ene 3 one and cholestane 3,6 dion in Yisheng Capsules were determined by capillary gas chromatography. The results provide a reference to work out its quality standard.

采用毛细管气相色谱法测定了益肾胶囊中胆甾-4-烯-3-酮、胆甾-3，6-二酮的含量，为该制剂制度质量标准提供了参考依据。

From Whitmania pigra 10 compounds were isolated and structurally elucidated based on the spectral data, 9 of them were the firstly isolated from this species. They are choles-4-ene-3-one, uracil, succinic acid, hypoxanthine,xanthine, octadecanoic and 2 polyhydroxy-saturated fatty acid.

五对宽体金线蛭的化学成分进行了提取、分离、鉴定，从中分得10个化合物，其中9个为首次从该动物中分得，包括1个为甾体化合物胆甾-4-烯-3-酮、2个多羟基脂肪酸、琥珀酸、尿嘧啶、黄嘌呤、次黄嘌呤、脲苷、十八碳酸等。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。