| abstract |
Compounds having the formula (I) and their salts are disclosed, as well as a process for preparing the same and their use as herbicides and plant growth regulators. In the formula, A stands for CH or N; X stands for hydrogen, halogen, cyano, nitro, hydroxy, a substituted or non-substituted aliphatic hydrocarbon or oxyhydrocarbon radical, substituted or non-substituted aryl or aryloxy, amino, mono- or disubstituted amino, or acyloxy; R1 stands for hydrogen, a substituted or non-substituted aliphatic hydrocarbon radical, acyl or a cation equivalent; R2 stands for hydrogen, a substituted or non-substituted aliphatic hydrocarbon radical, substituted or non-substituted aryl or heteroaryl; and R3, R4 independently represent hydrogen, alkyl, alkoxy, halogen, haloalkyl, haloalkoxy, alkylamino or dialkylamino. |