The other phase consists of {HEAD ~ hexamethylene diamine} containing water and {TAIL ~ small amounts} of sodium hydroxide 
containing
The other phase consists of { HEAD ~ hexamethylene diamine } containing water and { TAIL ~ small amounts } of sodium hydroxide
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH