Patent ID: 7794802

Claim:
A compound represented by formula (1): wherein A represents 1,4-cyclohexylene, 1,4-phenylene, 1,3-phenylene, 1,4-cyclohexenylene, pyridin-2,5-diyl, pyridazin-3,6-diyl, pyrimidin-2,5-diyl, bicyclo[2.2.2]octan-1,4-diyl, naphthalen-2,6-diyl, tetrahydronaphthalen-2,6-diyl, fluoren-2,7-diyl or 1,3-dioxan-2,5-diyl, and arbitrary hydrogen of the rings may be replaced by halogen, alkyl having from 1 to 3 carbon atoms or fluoroalkyl having from 1 to 3 carbon atoms; Z represents a single bond, —COO—, —OCO—, —OCOO—, —CH 2 CH 2 —, —CH 2 O—, —OCH 2 —, CF 2 CF 2 , —CH═CH—, —CF═CF—, —C≡C—, —CF 2 O—, —OCF 2 —, —CH 2 CH 2 CF 2 —, —OCF 2 CH 2 CH 2 —, —CH 2 CH 2 COO—, —OCOCH 2 CH 2 —, —CH═CHCOO—, —OCOCH═CH—, —C≡CCOO— or —OCOC≡C—; m represents an integer of from 0 to 3, and when m is 2 or 3, plural groups represented by A may be the same as or different from each other, and plural groups represented by Z may be the same as or different from each other; X 0 represents a single bond or alkylene having from 1 to 20 carbon atoms, and in the alkylene, arbitrary —CH 2 — may be replaced by —O—, —S— or —CH═CH—, and arbitrary hydrogen may be replaced by fluorine; Z 0 represents —O—, —COO— or —OCOO—; X represents a single bond or alkylene having from 1 to 20 carbon atoms, and in the alkylene, arbitrary —CH 2 — may be replaced by —O—, —S—, —COO—, —OCO— or —OCOO—, and arbitrary hydrogen may be replaced by fluorine; R represents a sterol moiety derived from vegetable organisms; P represents one of polymerizable groups represented by formulae (P1) to (P8); and W represents hydrogen, halogen, alkyl having from 1 to 3 carbon atoms or fluoroalkyl having from 1 to 3 carbon atoms.