... 3 J. Suwiński, W. Szczepankiewicz, Comprehensive Heterocyclic Chemistry III, 2008, 397 CrossRef; 4 Heiner Detert, Volker Schmitt, Acidochromism of stilbenoid chromophores with ap-aminoaniline centre, Journal of Physical Organic Chemistry, 2006, 19, 8-9, 603 ...