| 摘要 |
The present invention relates to a composition for dyeing keratin fibres, in particular human hair, containing, in a medium which is suitable for dyeing:as coupler, at least one compound of formulaor one of the addition salts with an acid, withR1 denotes, in particular, hydrogen, alkyl, aryl, a heterocycle, halogen,R2 denotes, in particular, hydrogen, halogen, alkoxy, aryloxy, acyloxy, arylthio, alkylthio,R3 has the same meanings as those for R1,Za and Zb, which are different, denote C=O or CR4, with R4 having the same meanings as R1;and at least one oxidation base. |
