4,5-Diformyl-4,5-bis-(4-methoxy-phenyl)-octan-1,8-dicarbonsaeure-dimethylester

3,4-Bis-(3-methoxycarbonyl-propyl)-3,4-bis-(4-methoxy-phenyl)-cyclobutan-1,2- diol

4-(Methoxycarbonylamino)buttersaeure-methylester

大茴香醛

5-(4-methoxyphenyl)-5-oxopentanoyl chloride