ethene

2,2-二甲基-4-戊烯酸

5-methyl-2-(2-methylbut-3-en-2-yl)-4,5-dihydrooxazole

ethyl 2,2-dimethyl-3-(4-toluenesulfonyloxy)butanoate

3-羟基-2,2-二甲基丁酸乙酯