(1R)-3-formyl-camphor

4,7,7-trimethyl-3-oxobicyclo[2.2.1]heptane-2-carbaldehyde

3,4,5-三甲氧基苯甲酸甲酯

dimethyl 4,4',5,5',6,6'-hexamethoxy-[1,1'-biphenyl]-2,2'-dicarboxylate