Synonyms: 3H-INDOLIUM, 2-[2-[5-[(1,3-DIHYDRO-3,3-DIMETHYL-1-PHENYL-2H-INDOL-2-YLIDENE)ETHYLIDENE]-5,6-DIHYDRO-2H-PYRAN-3-YL]ETHENYL]-3,3-DIMETHYL-1-PHENYL-, TETRAFLUOROBORATE(1-);2-((E)-2-[5-[(Z)-2-(3,3-DIMETHYL-1-PHENYL-1,3-DIHYDRO-2H-INDOL-2-YLIDENE)ETHYLIDENE]-2H-PYRAN-3(6H)-YL]ETHENYL)-3,3-DIMETHYL-1-PHENYL-3H-INDOLIUM TETRAFLUOROBORATE