| 摘要 |
Substituted 1-(dihydroxybenzyl)indocarbocyanine magenta dye developers having the general formula WHEREIN R represents a hydrogen atom, an alkyl group, or an aryl group, R1 and R2 represent alkyl groups or when taken together constitute the number of carbon atoms necessary to form a carbocyclic ring having five, six or seven members and X represents an acid anion, provide improved dye hue and reduced color contamination in diffusion transfer systems.
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