1-O-ethyl 4-O-methyl 3-methyl-2-oxobutanedioate

1-(Dimethoxymethyl)-4-iodobenzene

4-氯-2-甲苯甲酸甲酯

Methyl 3-chloro-2-methylbenzoate

methyl 3-methylpent-2-en-4-ynoate