Disclosed is a dye forming coupler represented by formula (I): ##STR1## wherein R.sup.1 and R.sup.2, which may be the same or different, each represents a substituent group, and X is a hydrogen atom or a group which can be eliminated by a coupling reaction with the oxidized species of a primary aromatic amine derivative.
本发明揭示了一种由式(I)表示的
染料形成
偶联剂:##STR1## 其中R.sup.1和R.sup.2可以相同也可以不同,分别表示取代基,X是氢原子或可以通过与一种原芳香胺衍
生物的氧化物偶联反应消除的基团。