1,2,3,4-tetrahydro-5-amino-8-hydroxy-quinolinium compounds
1,2,4-triazole derivatives substituted with a thio or seleno...
1,2-naphthoquinone-2-diazidesulfonate ester photosensitive...
1,4-bis(2'-isopropyl-6'-methylanilino)anthraquinone and a...
1-aminopyridinium dyes as sensitizers in electrophotography