| http://www.w3.org/ns/prov#value | - In Structure (IA) above, Y is a hydrogen atom or a group which is removable by the coupling reaction with a developing agent oxidant.Examples of the groups represented by Y functioning as anionic removable groups of the 2-equivalent couplers include halogen atoms (for example, chlorine and bromine), an aryloxy group (for example, phenoxy, 4-cyanophenoxy or 4-alkoxycarbonylphenyl), an alkylthio gro
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