STRUCTURE COUPLER 7 AMINO-1,2,3,4-TETRAHYDROQUINOLINES, TINCTORIAL COMPOSITION COMPRISING THE SAME, METHODS AND USES

摘要

The invention relates to the use of particular heterocyclic couplers derived from 7-amino-1,2,3,4-tetrahydroquinoline of formula (I) for dyeing keratinous fibers such as the hair: Formula (I) in which: R to R, X, R to R and X are as defined in the description.