| http://www.w3.org/ns/prov#value | - The following is a listing of fused carbocyclic ring compounds that can form the entire dye or a chromophoric unit of a dye contemplated for use in the practice of the invention: ##STR5## These pentacarbocyclic aromatic rings have the advantage that they can be deposited by vacuum vapor deposition, similarly as the other components of the organic medium.
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