| 摘要 |
Herbicidally-active compounds of the formula: <IMAGE> (I) where: Y represents halo or trifluoromethyl; Z represents hydrogen, halo, trifluoromethyl or nitro; A represents -N= or <IMAGE> where X is as defined above for Z; and R represents -N-Q+ or -NH-Q+An- where Q+ is a quaternized heterocyclic group bonded through a nitrogen atom thereof, and An- is a suitable anion, methods for their preparation and compositions containing them. |
