methyl 2,3-dimethylbut-3-enoate

4-甲基-6-(1-甲基乙基)-2H-吡喃-2-酮

methyl 4-bromo-3-(bromomethyl)but-2-enoate

6-butyl-4-methylpyran-2-one

4-甲基-6-戊基-2H-吡喃-2-酮