Quinone derivative and electrophotographic photosensitive member

A quinone derivative represented by general formula (1), (2), or (3) shown below, wherein

• in general formulae (1), (2), and (3),
• R1, R2, R3, R4, R11, R12, R13, R14, R21, R22, R23, and R24 each represent,
• independently of one another, a hydrogen atom, a cyano group, a halogen atom, an optionally substituted alkyl group having a carbon number of at least 1 and no greater than 6, or an optionally substituted alkoxy group having a carbon number of at least 1 and no greater than 6, and
• R5, R6, R15, R16, R25, and R26 each represent, independently of one another, an optionally substituted alkyl group having a carbon number of at least 1 and no greater than 6, an optionally substituted alkoxy group having a carbon number of at least 1 and no greater than 6, an optionally substituted aryl group having a carbon number of at least 6 and no greater than 14, an optionally substituted aralkyl group having a carbon number of at least 7 and no greater than 12, or an optionally substituted cycloalkyl group having a carbon number of at least 3 and no greater than 10.