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