The compound 1, wherein n is the integer 0, X1 is a single convalent bond, ring A1 is trans 1,4 cyclohexylene, ring A2 is 1,4 phenylene, R1 is 4 pentenyl and {HEAD ~ R2} is {TAIL ~ ethyl}, CN or NCS 
is
The compound 1 , wherein n is the integer 0 , X1 is a single convalent bond , ring A1 is trans 1,4 cyclohexylene , ring A2 is 1,4 phenylene , R1 is 4 pentenyl and { HEAD ~ R2 } is { TAIL ~ ethyl } , CN or NCS
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH