| 摘要 |
This invention discloses chemical compounds of the formula <IMAGE> wherein X and Z are each independently selected from the group consisting of halogen, haloalkyl, nitro, cyano, alkyl, alkoxy and alkylthio; m and n are each independently integers of from 0 to 4; Y is selected from the group consisting of oxygen, sulfur, methylene, sulfonyl and sulfinyl; and R is selected from the group consisting of hydrogen, alkyl and alkoxy. The compounds of the above description are useful as herbicides.
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