POLYCYCLIC DYE

Polycyclic dyes of Formula A: wherein: X is -C2-4-alkyl; and Y is C1-4-alkyl. X is preferably ethyl and Y is preferably C1-3-alkyl, more preferably C1-2-alkyl. It is further preferred that when X is ethyl, Y is ethyl or methyl and especially the latter.

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Bibliographische Detailangaben
Hauptverfasser: NAIJIERU HOORU, FURANKU ROBINSON
Format: Patent
Sprache:eng
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Zusammenfassung:Polycyclic dyes of Formula A: wherein: X is -C2-4-alkyl; and Y is C1-4-alkyl. X is preferably ethyl and Y is preferably C1-3-alkyl, more preferably C1-2-alkyl. It is further preferred that when X is ethyl, Y is ethyl or methyl and especially the latter.