Composition

A composition comprising:

• a compound represented by Formula (1′) below;
• and
• a polymerizable smectic liquid crystal compound,
• where:
• R1 represents a C1-C10 alkyl group which can have a halogen atom, a C1-C10 acyl group which can have a halogen atom, a C2-C10 alkoxycarbonyl group which can have a halogen atom, a C1-C10 acyloxy group which can have a halogen atom, or —N(R10)(R11);
• R10 represents a C1-C20 acyl group, a C1-C20 alkylsulfonyl group, or a C6-C20 arylsulfonyl group;
• R11 represents a hydrogen atom or a C1-C20 alkyl group;
• R10 and R11 can bond to each other, and form, with a nitrogen atom to which R10 and R11 bond, a ring including —N—CO— or —N—SO2—;
• at least one hydrogen atom of any of the alkyl group, the acyl group, the alkoxycarbonyl group, the acyloxy group, the alkylsulfonyl group, and the arylsulfonyl group can be substituted by a halogen atom, a hydroxy group, an unsubstituted amino group, or a substituted amino group;
• —O— or —NR20— can be inserted between carbon atoms of the alkyl group;
• R20 represents a hydrogen atom or a C1-C20 alkyl group;
• R5 is a group selected from the following groups:
• where:
• m is an integer from 0 to 10;
• and
• in a case where there are two m in the same group, the two m have the same value or differing values.