Patent ID: 8372306

Claim:
A compound represented by formula (1-1): wherein R 1 is alkenyl having 2 to 10 carbons, in the alkenyl arbitrary —CH 2 — may be replaced by —O—, —S—, —CO—or —SiH 2 —, provided that plural —CH 2 — adjacent to each other are not replaced simultaneously; R 2 is alkyl having 1 to 10 carbons, in the alkyl having 2 to 10 carbons arbitrary —CH 2 — may be replaced by —O—, —S—, —CO— or —SiH 2 —, provided that plural —CH 2 — adjacent to each other are not replaced simultaneously, and arbitrary —(CH 2 ) 2 — may be replaced by —CH═CH— or —C≡C—; ring G and ring J are each independently 1,4-cyclohexylene or 1,4-phenylene, in the 1,4-cyclohexylene arbitrary —CH 2 — may be replaced by —O—, —S—, —CO— or —SiH 2 —, and arbitrary —(CH 2 ) 2 — may be replaced by —CH═CH—, and in the 1,4-phenylene arbitrary —CH═ may be replaced by —N═; and s and t are each independently 0, 1, 2 or 3, provided that the sum of s and t is 1, 2 or 3, provided that in formula (1-1), when s=1 and t=0, ring G is 1,4-phenylene, in which arbitrary —CH═ may be replaced by —N═.