| abstract |
1. An electrophotographic photosensitive member comprising an electroconductive support and a photosensitive layer on said electroconductive support, said a compound represented by the formula (16) wherein each of R<sub>16-1</sub> and R<sub>16-2</sub> is a substituted or unsubstituted alkyl group or a substituted or unsubstituted aromatic ring group; each of R<sub>16-3</sub> and R<sub>16-4</sub> is a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aromatic ring group; X is an oxygen atom, a sulfur atom, =C(CN)<sub>2</sub>, each of R<sub>16-5</sub> and R<sub>16-6</sub> is a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aromatic ring group or a substituted or unsubstituted heterocyclic ring group; each of R<sub>16-7</sub> and R<sub>16-8</sub> is a hydrogen atom, a cyano group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aromatic ring group or a substituted or unsubstituted heterocyclic ring group, provided that R<sub>16-5</sub> and R<sub>16-6</sub> as well as R<sub>16-7</sub> and R<sub>16-8</sub> are not hydrogen atoms at the same time. |