1,1'-[(1S)-2,2',3,3'-Tetrahydro-3,3,3',3',5,5'-hexamethyl-1,1'-spirobi[1H-indene]-7,7'-diyl]bis[1,1-diphenylphosphine]

1,1'-[(1S)-2,2',3,3'-Tetrahydro-3,3,3',3',5,5'-hexamethyl-1,1'-spirobi[1H-indene]-7,7'-diyl]bis[1,1-diphenylphosphine],