| 摘要 |
<p>Compounds of the formula (* CHEMICAL STRUCTURE *) (1) in which X is the radical (* CHEMICAL STRUCTURE *) where R1 and R2 are in each case a hydrogen atom, an alkyl-(C1-C10) group, aryl group, alkyl(C1-C6)-CO group or aryl-CO group, where the aryl or aryl-CO group in the case of R1 and R2 can be substituted on the aromatic ring by fluorine and/or chlorine atoms and/or alkyl(C1-C4) groups, or R1 and R2 together are a phthaloyl radical which can be substituted on the aromatic ring by 4 chlorine atoms or 4 fluorine atoms, or where X is the radical (* CHEMICAL STRUCTURE *) which can be substituted on the aromatic ring by fluorine and/or chlorine atoms and/or alkyl(C1-C4) groups, and processes for their preparation.</p> |
