结果表明，此类磺酰脲类化合物的除草活性与苯环5位取代基的立体结构和电场性质密切相关。

The results show that herbicidal activity is closely related to the steric and electronic properties of the 5-position of the benzene ring.

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结论甾醇结构中的24位取代基影响甾醇的吸收。

Conclusion 24-substituent of sterol affects the absorption of sterols.

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本实验研究了一系列N-邻位取代苯基马来酰亚胺的合成。

In this study we synthesized a series of N-(o-substituted phenyl) maleimides.

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