[1,1-联苯]-2-羧酸, 4,4-二羟基

(7-acetyloxy-9-oxofluoren-2-yl) acetate

4-羟基苯硼酸

2-溴-5-羟基苯甲酸甲酯

methyl 4,4'-dihydroxy-[1,1'-biphenyl]-2-carboxylate