| 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 formula:or one of the addition salts thereof with an acid, in which:R2 denotes, in particular, hydrogen, halogen, alkoxy, aryloxy, acetylamido, etc.R1 and R3, which are independent, denote, in, particular: hydrogen, alkyl, aryl, a heterocycle, etc.it being understood that when R2 and R1 simultaneously represent a hydrogen atom, then R1 is other than a hydrogen atom, a C1-C5 alkyl radical or a phenyl radical;and at least one oxidation base.
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