Spiro[1,3-dioxane-5,2'-[2H]indene]-4,6-dione, 1',3'-dihydro-2,2-dimethyl- (en)

1,2-二(溴甲基)苯

邻苯二甲酸

丙二酸二乙酯

ethyl 2-hydroxy-2,3-dihydro-1H-indene-2-carboxylate