Patent ID: 8470199

Claim:
A compound represented by formula (1-1): wherein R 1 is hydrogen, alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons, alkoxy having 1 to 9 carbons, alkoxyalkyl having 2 to 9 carbons or alkenyloxy having 2 to 9 carbons; R 2 is hydrogen, alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons, alkoxy having 1 to 9 carbons, alkoxyalkyl having 2 to 9 carbons, alkenyloxy having 2 to 9 carbons, halogen, —C≡N, —SF 5 , —CF 3 , —CHF 2 , —CH 2 F, —OCF 3 , —OCHF 2 or —OCH 2 F; the ring A 1 and the ring A 2 are independently 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene, 1,4-cyclohexenylene, tetrahydropyran-2,5-diyl, or tetrahydropyran-3,6-diyl; Q is hydrogen or fluorine; and m and n are independently 0, 1, 2 or 3, and the sum of m and n is 3, wherein arbitrary two of the ring A 1 may be the same or different when m is 2 or 3, and arbitrary two of the ring A 2 may be the same or different when n is 2 or 3.