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