C09B5/2454 - CPC Classification

Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings the heterocyclic rings being only condensed with an anthraquinone nucleus in 1-2 or 2-3 position not provided for in one of the sub groups  -  only nitrogen-containing hetero rings; Phtaloyl isoindoles 5,6 phtaloyl dihydro isoindoles

• C09B5/2463 » {1,3 oxo or imino derivatives} 0