Patent ID: 8288066

Claim:
An electrophotographic photoreceptor comprising an electroconductive support having thereon a photosensitive layer, wherein said photosensitive layer comprises: a compound represented by the following formula (1): wherein R 1 is a group represented by the following formula (2) with a chiral center being the carbon atom designated with a notation â€œ*â€: wherein R 9 , R 10 and R 11 are groups different from each other and each represents a hydrogen atom, an alkyl group which may have a substituent, or an alkenyl group which may have a substituent, R 2 represents a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent, R 3 and R 4 each independently represents an alkylene group which may have a substituent, or an arylene group which may have a substituent, and R 5 , R 6 , R 7 and R 8 each independently represents an alkyl group which may have a substituent, or an aryl group which may have a substituent, with the proviso that at least one of R 5 to R 8 is an aryl group having a substituent; and an azo pigment represented by the following formula (3): wherein R 12 represents an alkyl group having a total carbon number of 4 to 20 and having a cycloalkyl group which may have an alkyl substituent, and Z represents provided that the ring X may have a substituent.