Diarylamine-based compound, anti-aging agent, and polymer composition

A diarylamine-based compound represented by General Formula (1):

• where, in General Formula (1), A1 and A2 each independently represent a C6 to C18 arylene group which may have a substituent, and A3 and A4 each independently represent any of organic groups represented by General Formulae (4) to (9):
• where, in General Formula (4), R3 and R4 each represent a hydrogen atom, in General Formulae (5), (6), (8) and (9), R3 to R8 each independently represent a hydrogen atom, a C1 to C30 alkyl group, a C1 to C30 alkenyl group, —O—R9, —O—C(═O)—R9, —C(═O)—O—R9, —C(═O)—NR9(R10), —NR9—C(═O)—R10, —CN, —SR9, —S(═O)—R9, or —S(═O)2—R9;
• R9 and R10 each independently represent a C1 to C30 alkyl group, a C1 to C30 alkenyl group, or a C6 to C12 aromatic group;
• in General Formula (7), R3 to R6 each represent a hydrogen atom;
• and when two or more R3 to R8 are present, these may be the same or may be different.