| 摘要 |
Herbicidal compounds of the formula <IMAGE> or <IMAGE> in which R1 is H, alkyl, alkenyl, alkynyl, haloalkyl, haloalkenyl, haloalkynyl, alkoxyalkyl, alkoxyalkoxyalkyl, alkylsulfonyl, aralkyl, alkylthioalkyl, hydroxy or alkoxy; R2 and R3 are independently H or alkyl; X is H, Cl or F; R4 is alkyl, haloalkyl, alkenyl or alklynyl.
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