Polymerizable compound, polymerizable composition, polymer, and optically anisotropic product

A compound represented by a formula (3),

• wherein each of Y1 to Y8 independently represents a chemical single bond, —O—, —S—, —O—C(═O)—, —C(═O)—O—, —O—C(═O)—O—, —NR1—C(═O)—, —C(═O)—NR1—, —O—C(═O)—NR1—, —NR1—C(═O)—O—, —NR1—C(═O)—NR1—, —O—NR1—, or —NR1—O—, R1 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms,
• each of G1 and G2 independently represents a substituted or unsubstituted divalent linear aliphatic group having 1 to 20 carbon atoms that optionally includes —O—, —S—, —O—C(═O)—, —C(═O)—O—, —O—C(═O)—O—, —NR3—C(═O)—, —C(═O)—NR3—, —NR3—, or —C(═O)—, provided that a case where the linear aliphatic group includes two or more contiguous —O— or —S— is excluded, R3 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms,
• each of Z1 and Z2 independently represents an alkenyl group having 2 to 10 carbon atoms that is substituted with a halogen atom, or unsubstituted,
• A1 represents a substituted or unsubstituted trivalent aromatic group,
• each of A2 and A3 independently represents a substituted or unsubstituted divalent alicyclic hydrocarbon group having 3 to 30 carbon atoms,
• each of A4 and A5 independently represents a substituted or unsubstituted divalent aromatic group having 6 to 30 carbon atoms,
• Q1 represents a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, an organic group having 2 to 30 carbon atoms that includes at least one aromatic ring selected from the group consisting of an aromatic hydrocarbon ring and a heteroaromatic ring, or a hydrogen atom, and
• each of n and m independently represents 0 or 1.