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US4889554A Diphenyl ether derivatives, their preparation and their use for controlling undesirable plant growth 失效
二苯醚衍生物,它们的制备及其用于控制​​不期望的植物生长的用途

Diphenyl ether derivatives, their preparation and their use for
controlling undesirable plant growth
Abstract:
Diphenyl ether derivatives of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3 and n have the meanings stated in the description, processes for their preparation, herbicides which contain these compounds as active ingredients, and a method of controlling undesirable plant growth by means of the novel compounds.
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