{TAIL ~ The compound} 3, wheren each R1 moiety is {HEAD ~ a 1,4 phenylene moiety} 
{ TAIL ~ The compound } 3 , wheren each R1 moiety is { HEAD ~ a 1,4 phenylene moiety }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD