Organic compounds -- part of the class 532-570 series
Organic compounds
Chalcogen in the nitrogen containing substituent
Inventor
active
Aliphatic bridged chromogenic bisquinazolines substituted with p
Bisphthalide lactones, their preparation and the use thereof in
Bisquinazolines useful in color former systems
Chromenoazaindolizine compounds
Chromogenic 3,3-bisindolyl-4-azaphthalides
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