Patent ID: 8465674

Claim:
A compound represented by the formula (1): in the formula (1), R 1 and R 2 are independently alkyl having 1 to 10 carbons, and in the alkyl, arbitrary —CH 2 — may be replaced by —O—, —S—, —CO— or —SiH 2 —, and arbitrary —(CH 2 ) 2 — may be replaced by —CH═CH— or —C≡C—; the ring A and the ring B are independently 1,4-cyclohexylene or 1,4-phenylene, and in the rings, arbitrary one —CH 2 — may be replaced by —O—, —S—, —CO— or —SiH 2 — and arbitrary —(CH 2 ) 2 — may be replaced by —CH═CH—, in the 1,4-phenylene, arbitrary —CH═ may be replaced by —N═, and in the rings, arbitrary hydrogen may be replaced by halogen, —CF 3 , —CHF 2 , —CH 2 F, —OCF 3 , —OCHF 2 or —OCH 2 F; Z 1 and Z 2 are independently a single bond or alkylene having 1 to 4 carbons, and in the alkylene, arbitrary —CH 2 — may be replaced by —O—, —S—, —CO— or —SiH 2 —, arbitrary —CH 2 ) 2 — may be replaced by —CH═CH— or —C≡C—, and arbitrary hydrogen may be replaced by halogen; and Z 3 is —CH 2 O— or —OCH 2 —; Y 1 and Y 2 are independently halogen, —CF 3 , —CHF 2 , —CH 2 F, —OCF 3 , —OCHF 2 or —OCH 2 F; and m and n are independently 0, 1 or 2, p is 1 or 2, and the sum of m, n and p is 1, 2 or 3.