2-溴代异丁酸甲酯

3,3-dimethyl-2,2,4-trimethoxy-4-phenyloxetane

dimethyl 2,2,3,3-tetramethylbutanedioate

methyl 2,2-dimethyl-3-phenylpropanoate

dimethyl 2,2-dimethyl-4-methylidenepentanedioate