Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings

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• C09B 5/002
• C09B 5/02 the heterocyclic ring being condensed in peri position
• C09B 5/24 the heterocyclic rings being condensed with an anthraquinone nucleus in 1-2 or 2-3 position
• C09B 5/62 Cyclic imides or amidines of peri-dicarboxylic acids of the anthracene, benzanthrene, or perylene series