four membered ring intermediate
four membered ring intermediate
四元环中间体
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The calculated results show that the aza Wittig reaction is a two step reaction, having one four membered ring intermediate on its reaction surface.
计算结果表明该反应是一个二步反应，在反应途径上存在一个四元环中间体。
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