| 摘要 |
<p>Title cpds. of formula (I): (where R is H or lower alkyl; m is 1 or 2, and n is 4, 5 or 6) which have non-selective herbicidal activity at higher rates of application and a selective action at lower rates of application, are prepd. by reacting corresp. isocyanate with corresp. amine, or an amine of formula (IV): with a corresp. chlorocarbonyl cpd. opt. in the presence of an acid binding agent.</p> |
