| 摘要 |
The invention relates to compounds of the formula <IMAGE> wherein Z denotes OH or NR1R2, R1 denotes hydrogen, alkyl, aralkyl, cycloalkyl or aryl, R2 denotes hydrogen or alkyl or, conjointly with R1, forms an alkylene chain. The dyestuffs are outstanding suitable for the dyeing of polyester fibres. The yellow and reddish dyeings are distinguished by good fastness to light.
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