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US07776106B2 Dyestuffs and hair dye compositions 失效
染料和染发剂组合物

Dyestuffs and hair dye compositions
摘要:
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 coloring hair.
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