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.
探讨了不同取代基的毒性作用机制。
The toxicity mechanism of different substitutions was discussed.
从而以高收率得到带各种取代基的环丙烷。
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