Herbicidal sulfonomides
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United States of America Patent
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May 29, 1990
Grant Date -
N/A
app pub date -
Oct 19, 1988
filing date -
Oct 20, 1987
priority date (Note) -
Expired
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Abstract
Compounds of the formula ##STR1## and salts thereof, W and W, being independently O and S, A being a nitrogen-containing heterocyclic ring system, E being O, S(O)m or NR.sub.3 where m is 0-2, R.sub.1, R.sub.2 and R.sub.3 is hydrogen, C.sub.1 -C.sub.4 alkyl or C.sub.2 -C.sub.4 alkenyl or alkynyl and E.sub.1 being hydrogen, halogen or one of a variety of organic substituents. The compounds are effective herbicides.
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