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