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