| 摘要 |
Dyestuffs of the formula D-N=N-A I in which D represents the radical of a diazo component and A represents the radical of a coupling component of the formulae <IMAGE> +TR <IMAGE> wherein R1, R2 and R3 designate hydrogen or non-ionic radicals, R designates hydrogen or an optionally substituted alkyl, cycloalkyl, aryl, aralkyl or heterocyclic radical, X designates OH or <IMAGE> T designates the remaining members of a fused-on ring and Y and Z designate hydrogen, optionally substituted alkyl or optionally substituted aryl, processes for their preparation and process for pigmenting organic material using the dyestuffs of the formula I.
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