对二甲苯二聚体

2-[4-[2-(4-oxaldehydoylphenyl)ethyl]phenyl]-2-oxoacetaldehyde

对苯二甲酸

4-[2-(4-carboxyphenyl)ethyl]benzoic acid

methyl 4-[2-(4-methoxycarbonylphenyl)ethyl]benzoate