1,3-Dihydroxybenzene derivatives and colorants containing said compounds
申请人:——
公开号:US20040016063A1
公开(公告)日:2004-01-29
1,3-Dihydroxybenzene derivatives of general formula (I) or (Ia) or physiologically tolerated, water-soluble thereof
1
wherein R′1 denotes substituted pyridyl group, a pyrimidyl group, a group of formula (IIa) or (IIIa)
2
and the dyeing agents for keratin fibers containing these compounds.