| 摘要 |
An electrophotographic photoreceptor having at least an undercoat layer and a photosensitive layer on an electroconductive substrate, wherein at least one layer of the undercoat layer contains a naphthalocyanine compound of the following formula (1): where, in the formula (1), M represents two hydrogen atoms, or a metal atom, provided that the metal atom may have a ligand, and each of X1, X2, X3 and X4 is a hydrogen atom or a substituent.
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