The present invention refers to dyestuffs of the general Formula (I) wherein R, X, Y and Z are defined as given in claim
1
, dyestuff mixtures and hair dye compositions comprising them, as well as a process for colouring hair.
本发明涉及一般式(I)中R、X、Y和Z如权利要求1所述的
染料,
染料混合物和含有它们的染发组合物,以及一种用于染发的方法。