It is also an object of the invention to provide {HEAD ~ agents} for {TAIL ~ the oxidative dyeing} of hair that are based upon bis alkanols as coupling components 
It is also an object of the invention to provide { HEAD ~ agents } for { TAIL ~ the oxidative dyeing } of hair that are based upon bis alkanols as coupling components
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH