P-diphenyl compound derivative mixture and method of producing the same

A mixture containing p-diphenyl compound derivatives represented by the following general formula (1), general formula (2), and general formula (3),

• in the general formula (1), the general formula (2), and the general formula (3),
• R1 represents a linear or branched alkyl group having 1 to 20 carbon atoms, which may have a substituent group, or a linear or branched alkoxy group having 1 to 20 carbon atoms, which may have a substituent group,
• R3 represents a hydrogen atom,
• R5, and R7 each independently represent a linear or branched alkyl group having 1 to 20 carbon atoms, which may have a substituent group, or a linear or branched alkoxy group having 1 to 20 carbon atoms, which may have a substituent group,
• R2, R4, R6 and R8 each independently represent a hydrogen atom.