Herbicidal pyridinium compounds and compositions
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United States of America Patent
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Jul 29, 1986
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N/A
app pub date -
Sep 27, 1984
filing date -
Oct 14, 1983
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Expired
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Abstract
Herbicidally-active compounds of the formula: ##STR1## where: Y represents halo or trifluoromethyl; Z represents hydrogen, halo, trifluoromethyl or nitro; A represents --N.dbd. or ##STR2## where X is as defined above for Z; and R represents --N.sup.- Q.sup.+ or --NH--Q.sup.+ An.sup.- where Q.sup.+ is a quaternized heterocyclic group bonded through a nitrogen atom thereof, and An.sup.- is a suitable anion, methods for their preparation and compositions containing them.
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