Patent ID: 8765235

Claim:
A compound represented by the following formula (I): wherein P 1 and P 2 each represents a polymerizable group selected from the groups represented by the following formulae (P-1) to (P-5): wherein R 11 to R 13 each represents a hydrogen atom or a methyl group; m1 and m2 each indicates an integer of from 2 to 8, and of m1 or m2 CH 2 's, one CH 2 or two or more CH 2 's not adjacent to each other may be replaced by an oxygen atom or a sulfur atom; R 1 and R 2 each represents an alkyl group having from 1 to 4 carbon atoms, an alkoxy group having from 1 to 4 carbon atoms, an alkoxycarbonyl group having from 2 to 5 carbon atoms, an acyloxy group having from 2 to 5 carbon atoms, an acyl group having from 2 to 4 carbon atoms, an amide group having from 2 to 5 carbon atoms, a cyano group or a halogen atom; and n1 and n2 each indicates an integer of from 0 to 4; R 3 represents a hydrogen atom, or an alkyl group having from 1 to 4 carbon atoms; Z 1 represents —COO—, —OCO—, —COS—, —SCO—or —NHCO—; L 1 represents —COO—, —OCO—, —COS—, —SCO—, —OCO—CH═CH—or —NHCO—; and n is 0, 1 or 2.