| abstract |
Compounds having selective herbicidal activity have the formula n<CHEM>n wherein R<1> is amino, C1-4 alkoxy or C1-4 alkylamino; R<2> is H, halogen or C1-4 alkyl; and R<3> is H, C1-4 alkyl, benzyl, furyl, or phenyl optionally substituted by halogen, hydroxyl, carboxyl, methoxycarbonyl, C1-4 alkyl or C1-4 alkoxy. |