376356-61-5

2,2',7,7'-Tetraamino-9,9'-spirobifluorene 9,9'-spirobi[fluorene]-2,2',7,7'-tetraamine 9,9'-Spirobi[9H-fluorene]-2,2',7,7'-tetramine 2,2',7,7'-tetraamino-9,9'-spirobi[9H-fluorene] IN1649, 9,9'-Spirobi[9H-fluorene]-2,2',7,7'-tetramine