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US4110355A Anthraquinone compounds useful in photographic processes 失效
用于摄影过程的蒽醌化合物

Anthraquinone compounds useful in photographic processes
摘要:
This invention relates to a novel class of compounds which are capable of reacting in such a way as to form a new heterocyclic ring, and as a function of such reaction and ring formation to split off a color-providing material.
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