| 摘要 |
Compounds of the formula <IMAGE> wherein Ar is aryl, R1 is halomethyl, R2 is hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, alkoxy, haloalkyl, alkylthio, alkenylthio, alkynylthio, aryl or NR5R6 wherein R5 and R6 individually are hydrogen, alkyl, alkenyl or alkynyl, R3 is hydrogen or alkyl, n is 1 or 2, Y is O, S or NR wherein R is hydrogen, alkyl, alkenyl or alkynyl, have been found to be useful herbicides.
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