| 摘要 |
Compounds defined by the generic formula <IMAGE> wherein R is hydrogen or hydroxyl, R1 is selected from the group consisting of methyl and hydrogen; R2 is selected from the group consisting of C1-C4 alkyl including methyl, ethyl, propyl and butyl and methoxy; R3 is selected from the group consisting of hydrogen, methyl and ethyl; m is 0 or 1; and n is 1 or 2, exhibit herbicidal activity.
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