| 摘要 |
The invention relates to indoline compounds of formula (I): <IMAGE> (I) in which: R1 and R2 denote hydrogen, alkyl, monohydroxyalkyl, polyhydroxyalkyl, nitro, hydroxyl, alkoxy or NHR where R can be hydrogen, alkyl, monohydroxyalkyl or polyhydroxyalkyl; X denotes oxygen or sulfur; R3 represents -OR4 or NR5R6 where R4 denotes alkyl, alkenyl, benzyl, alkoxyalkyl or haloalkyl; R5 and R6 denote alkyl; R1 and R2 not simultaneously denoting hydrogen or nitro and when R1 denotes alkyl, alkoxy or mono- or polyhydroxyalkyl, R2 denotes NHR or hydroxyl, and to their use in dyeing keratinous fibers.
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