| 摘要 |
Plant growth regulants and herbicides of the formula <IMAGE> in which R1 represents hydrogen or alkyl, R2 represents cyano or nitro, R3 and R4 independently of one another each represent hydrogen, alkyl, alkoxyalkyl, alkylthioalkyl or halogenoalkyl or represent optionally substituted aryl, or R3 and R4 together represent a divalent alkylene radical, R5 represents hydrogen or alkyl and Ar represents optionally substituted phenyl, or represented optionally substituted pyridyl. |
