Synonyms: N2,N2',N7,N7'-Tetrakis(3-Methoxyphenyl)-N2,N2',N7,N7'-tetrakis(4-Methoxyphenyl)-9,9'-spirobi[fluorene]-2,2',7,7'-tetraaMine;9,9'-Spirobi[9H-fluorene]-2,2',7,7'-tetraMine,N2,N7,N2',N7'-tetrakis(3-Methoxyphenyl)-N2,N7,N2',N7'-tetrakis(4-Methoxyphenyl)-