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