3-溴-4,5-二甲氧基苯酚

methyl (E)-6,7-dimethoxy-4-oxo-3-(3-oxobut-1-en-1-yl)-4H-chromene-5-carboxylate

tert-butyl 2-acetyl-3-((tert-butyldimethylsilyl)oxy)-5-hydroxy-6-(pivaloyloxy)benzoate

tert-butyl 2-acetyl-3-((tert-butyldimethylsilyl)oxy)-5-(methoxymethoxy)-6-(pivaloyloxy)benzoate

tert-butyl 3-(1-hydroxy-3-oxobut-1-en-1-yl)-7-(methoxymethoxy)-4-oxo-6-(pivaloyloxy)-4H-chromene-5-carboxylate