An electrophotographic material comprising a support having thereon at least one layer comprising a binder and a compound of the formula: ##STR22## wherein R1 and R2 are the same or different and are an alkyl group or combine with the nitrogen atom to form a 5- or 6-membered ring, and X is a pyridyl group, a quinolyl group, or a pyridyl or quinolyl group substituted by at least one alkyl or alkoxy