Terphenyl compound, electrophotographic photosensitive member, and method for producing terphenyl compound

An electrophotographic photosensitive member comprising a conductive substrate and a photosensitive layer, wherein

• the photosensitive layer contains at least a charge generating material, a hole transport material, and a binder resin,
• the hole transport material includes a compound represented by general formula (1) shown below,
• the binder resin includes a polyarylate resin,
• the polyarylate resin is
• a polyarylate resin including repeating units represented by chemical formula (10-2), chemical formula (11-X1), and chemical formula (11-X2), or
• a polyarylate resin including repeating units represented by chemical formula (10-1), chemical formula (12-1), and chemical formula (11-X3), and
• the photosensitive layer includes a charge generating layer containing the charge generating material and a charge transport layer containing the hole transport material and the binder resin, or the photosensitive layer is a single-layer photosensitive layer containing the charge generating material, the hole transport material, and the binder resin,
• wherein in the general formula (1),
• R1 and R2 each represent, independently of one another, a hydrogen atom, a methyl group, or an ethyl group, and a sum of the number of carbon atoms of the chemical group represented by R1 and the number of carbon atoms of the chemical group represented by R2 is 2, and
• R3 and R4 each represent, independently of one another, a hydrogen atom, a methyl group, or an ethyl group, and a sum of the number of carbon atoms of the chemical group represented by R3 and the number of carbon atoms of the chemical group represented by R4 is 2