More specifically, this invention is directed to bis alkanols and their use as coupling {HEAD ~ components} in {TAIL ~ oxidation hair} dyes 
in
More specifically , this invention is directed to bis alkanols and their use as coupling { HEAD ~ components } in { TAIL ~ oxidation hair } dyes
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH