Alpha-甲基乙酰丙酸

3,5-dimethyl-3H-furan-2-one

(4-methyl-5-oxo-2,5-dihydrofuran-2-yl)methyl 4-methylbenzenesulfonate

methyl 3-hydroxy-2-methyl-3-(oxiran-2-yl)propanoate

4-methyl-5-oxo-2-((tosyloxy)methyl)tetrahydrofuran-3-yl 4-methylbenzenesulfonate