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