2-[2-[2-[7-[2-[7'-(3,4-dihydro-2H-quinolin-1-yl)spiro[1,3-dihydroindene-2,9'-fluorene]-2'-yl]ethenyl]-9,9-dimethylfluoren-2-yl]-2-azatricyclo[9.4.0.03,8]pentadeca-1(15),3(8),4,6,11,13-hexaen-9-yn-5-yl]prop-1-enyl]-4-[5-[2-[7'-(3,4-dihydro-2H-quinolin-1-yl)spiro[1,3-dihydroindene-2,9'-fluorene]-2'-yl]ethenyl]naphthalen-1-yl]-3-methyl-1,4-benzothiazine