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