abstract |
The subject of the present invention is a symmetric or asymmetric azomethine direct dye of formula (I) comprising at least one pyrazolopyridine unit, a composition comprising said dye, a A method for dyeing keratin fibers, a method for preparing the compound, a synthetic intermediate and a kit. In the formula (I), X, Y 1 , Y 2 , Z 1 and R 1 to R 5 are as defined in this specification. |