diethyl 2-(2-methylprop-2-enyl)propanedioate

2-乙酰基-4-甲基-4-戊烯酸乙酯

methyl 4-methylpent-4-enoate

1-甲氧基-4-(2-甲基-2-丙烯-1-基)苯

(2-methyl-4-oxopentyl) acetate