Compounds, and agents for oxidatively changing the color of keratinic fibers that include such compounds, in particular human hair, in a cosmetic carrier. The compounds are at least one oxidation dye precursor product of formula (I) and/or physiologically acceptable salt thereof,in whichR1, R2, R3, R4 independently of one another, stand for a hydrogen atom, a C1-C6 alkyl group, a C2-C6 alkenyl group, a hydroxy-(C1-C6)-alkyl group, a polyhydroxy-(C2-C6)-alkyl group, or a C1-C6-alkoxy-C2-C6-alkyl group,n stands for an integer from 2 to 6, andZ stands for an aromatic or aliphatic heterocycle or for an aromatic or aliphatic carbocycle.
