1,1,1',1'-tetramethyl-3,3'-spirobi[2H-indene]-4,4',5,5',6,6'-hexol

2,6-dimethylhept-2-en-4-one

1,1,2,2-四苯乙烯

2,2,6,6-四甲基-2H-3,5,6-三氢吡喃-4-酮

碘